/**
 * @preserve jquery.layout 1.3.0 - Release Candidate 29.15
 * $Date: 2011-06-25 08:00:00 (Sat, 25 Jun 2011) $
 * $Rev: 302915 $
 *
 * Copyright (c) 2010
 *   Fabrizio Balliano (http://www.fabrizioballiano.net)
 *   Kevin Dalman (http://allpro.net)
 *
 * Dual licensed under the GPL (http://www.gnu.org/licenses/gpl.html)
 * and MIT (http://www.opensource.org/licenses/mit-license.php) licenses.
 *
 * Changelog: http://layout.jquery-dev.net/changelog.cfm#1.3.0.rc29.15
 *
 * Docs: http://layout.jquery-dev.net/documentation.html
 * Tips: http://layout.jquery-dev.net/tips.html
 * Help: http://groups.google.com/group/jquery-ui-layout
 */

// NOTE: For best readability, view with a fixed-width font and tabs equal to 4-chars

;
(function ($) {

    /*
     *	GENERIC $.layout METHODS - used by all layouts
     */
    $.layout = {

        version:    "1.3.rc29.15"
        ,    revision:    0.032915 // 1.3.0 final = 1.0300 - major(n+).minor(nn)+patch(nn+)

        // LANGUAGE CUSTOMIZATION
        ,    language: {
            //	Tips and messages for resizers, togglers, custom buttons, etc.
            Open:            "Open"    // eg: "Open Pane"
            ,    Close:            "Close"
            ,    Resize:            "Resize"
            ,    Slide:            "Slide Open"
            ,    Pin:            "Pin"
            ,    Unpin:            "Un-Pin"
            ,    noRoomToOpenTip: "Not enough room to show this pane."
            //	Developer error messages
            ,    pane:                    "pane"        // description of "layout pane element"
            ,    selector:                "selector"    // description of "jQuery-selector"
            ,    errButton:                "Error Adding Button \n\nInvalid "
            ,    errContainerMissing:    "UI Layout Initialization Error\n\nThe specified layout-container does not exist."
            ,    errCenterPaneMissing:    "UI Layout Initialization Error\n\nThe center-pane element does not exist.\n\nThe center-pane is a required element."
            ,    errContainerHeight:        "UI Layout Initialization Warning\n\nThe layout-container \"CONTAINER\" has no height.\n\nTherefore the layout is 0-height and hence 'invisible'!"
        }

        // can update code here if $.browser is phased out
        ,    browser: {
            mozilla:    !!$.browser.mozilla
            ,    webkit:        !!$.browser.webkit || !!$.browser.safari // webkit = jQ 1.4
            ,    msie:        !!$.browser.msie
            ,    isIE6:        !!$.browser.msie && $.browser.version == 6
            ,    boxModel:    false    // page must load first, so will be updated set by _create
            //,	version:	$.browser.version - not used
        }

        /*
         *	GENERIC UTILITY METHODS
         */

        // calculate and return the scrollbar width, as an integer
        ,    scrollbarWidth:        function () {
            return window.scrollbarWidth || $.layout.getScrollbarSize('width');
        }
        ,    scrollbarHeight:    function () {
            return window.scrollbarHeight || $.layout.getScrollbarSize('height');
        }
        ,    getScrollbarSize:    function (dim) {
            var $c = $('<div style="position: absolute; top: -10000px; left: -10000px; width: 100px; height: 100px; overflow: scroll;"></div>').appendTo("body");
            var d = { width: $c.width() - $c[0].clientWidth, height: $c.height() - $c[0].clientHeight };
            $c.remove();
            window.scrollbarWidth = d.width;
            window.scrollbarHeight = d.height;
            return dim.match(/^(width|height)$/i) ? d[dim] : d;
        }


        /**
         * Returns hash container 'display' and 'visibility'
         *
         * @see    $.swap() - swaps CSS, runs callback, resets CSS
         */
        ,    showInvisibly: function ($E, force) {
            if (!$E) return {};
            if (!$E.jquery) $E = $($E);
            var CSS = {
                display:    $E.css('display')
                ,    visibility:    $E.css('visibility')
            };
            if (force || CSS.display == "none") { // only if not *already hidden*
                $E.css({ display: "block", visibility: "hidden" }); // show element 'invisibly' so can be measured
                return CSS;
            }
            else return {};
        }

        /**
         * Returns data for setting size of an element (container or a pane).
         *
         * @see  _create(), onWindowResize() for container, plus others for pane
         * @return JSON  Returns a hash of all dimensions: top, bottom, left, right, outerWidth, innerHeight, etc
         */
        ,    getElementDimensions: function ($E) {
            var
                    d = {}            // dimensions hash
                    ,    x = d.css = {}    // CSS hash
                    ,    i = {}            // TEMP insets
                    ,    b, p                // TEMP border, padding
                    ,    N = $.layout.cssNum
                    ,    off = $E.offset()
                    ;
            d.offsetLeft = off.left;
            d.offsetTop = off.top;

            $.each("Left,Right,Top,Bottom".split(","), function (idx, e) { // e = edge
                b = x["border" + e] = $.layout.borderWidth($E, e);
                p = x["padding" + e] = $.layout.cssNum($E, "padding" + e);
                i[e] = b + p; // total offset of content from outer side
                d["inset" + e] = p;
            });

            d.offsetWidth = $E.innerWidth();
            d.offsetHeight = $E.innerHeight();
            d.outerWidth = $E.outerWidth();
            d.outerHeight = $E.outerHeight();
            d.innerWidth = Math.max(0, d.outerWidth - i.Left - i.Right);
            d.innerHeight = Math.max(0, d.outerHeight - i.Top - i.Bottom);

            x.width = $E.width();
            x.height = $E.height();
            x.top = N($E, "top", true);
            x.bottom = N($E, "bottom", true);
            x.left = N($E, "left", true);
            x.right = N($E, "right", true);

            //d.visible	= $E.is(":visible");// && x.width > 0 && x.height > 0;

            return d;
        }

        ,    getElementCSS: function ($E, list) {
            var
                    CSS = {}
                    ,    style = $E[0].style
                    ,    props = list.split(",")
                    ,    sides = "Top,Bottom,Left,Right".split(",")
                    ,    attrs = "Color,Style,Width".split(",")
                    ,    p, s, a, i, j, k
                    ;
            for (i = 0; i < props.length; i++) {
                p = props[i];
                if (p.match(/(border|padding|margin)$/))
                    for (j = 0; j < 4; j++) {
                        s = sides[j];
                        if (p == "border")
                            for (k = 0; k < 3; k++) {
                                a = attrs[k];
                                CSS[p + s + a] = style[p + s + a];
                            }
                        else
                            CSS[p + s] = style[p + s];
                    }
                else
                    CSS[p] = style[p];
            }
            ;
            return CSS
        }

        /**
         * Contains logic to check boxModel & browser, and return the correct width/height for the current browser/doctype
         *
         * @see  initPanes(), sizeMidPanes(), initHandles(), sizeHandles()
         * @param  {Array.<Object>}    $E  Must pass a jQuery object - first element is processed
         * @param  {number=}            outerWidth/outerHeight  (optional) Can pass a width, allowing calculations BEFORE element is resized
         * @return {number}        Returns the innerWidth/Height of the elem by subtracting padding and borders
         */
        ,    cssWidth: function ($E, outerWidth) {
            var
                    b = $.layout.borderWidth
                    ,    n = $.layout.cssNum
                    ;
            // a 'calculated' outerHeight can be passed so borders and/or padding are removed if needed
            if (outerWidth <= 0) return 0;

            if (!$.layout.browser.boxModel) return outerWidth;

            // strip border and padding from outerWidth to get CSS Width
            var W = outerWidth
                    - b($E, "Left")
                    - b($E, "Right")
                    - n($E, "paddingLeft")
                    - n($E, "paddingRight")
                    ;

            return Math.max(0, W);
        }

        ,    cssHeight: function ($E, outerHeight) {
            var
                    b = $.layout.borderWidth
                    ,    n = $.layout.cssNum
                    ;
            // a 'calculated' outerHeight can be passed so borders and/or padding are removed if needed
            if (outerHeight <= 0) return 0;

            if (!$.layout.browser.boxModel) return outerHeight;

            // strip border and padding from outerHeight to get CSS Height
            var H = outerHeight
                    - b($E, "Top")
                    - b($E, "Bottom")
                    - n($E, "paddingTop")
                    - n($E, "paddingBottom")
                    ;

            return Math.max(0, H);
        }

        /**
         * Returns the 'current CSS numeric value' for a CSS property - 0 if property does not exist
         *
         * @see  Called by many methods
         * @param {Array.<Object>}    $E            Must pass a jQuery object - first element is processed
         * @param {string}            prop        The name of the CSS property, eg: top, width, etc.
         * @param {boolean=}            allowAuto    true = return 'auto' if that is value; false = return 0
         * @return {(string|number)}                Usually used to get an integer value for position (top, left) or size (height, width)
         */
        ,    cssNum: function ($E, prop, allowAuto) {
            if (!$E.jquery) $E = $($E);
            var CSS = $.layout.showInvisibly($E)
                    ,    p = $.curCSS($E[0], prop, true)
                    ,    v = allowAuto && p == "auto" ? p : (parseInt(p, 10) || 0);
            $E.css(CSS); // RESET
            return v;
        }

        ,    borderWidth: function (el, side) {
            if (el.jquery) el = el[0];
            var b = "border" + side.substr(0, 1).toUpperCase() + side.substr(1); // left => Left
            return $.curCSS(el, b + "Style", true) == "none" ? 0 : (parseInt($.curCSS(el, b + "Width", true), 10) || 0);
        }


        /**
         * UTLITY for mouse tracking - FUTURE REFERENCE
         *
         * init: if (!window.mouse) {
         *            window.mouse = { x: 0, y: 0 };
         *            $(document).mousemove( $.layout.trackMouse );
         *        }
         *
         * @param {Object}        evt
         *
         ,    trackMouse: function (evt) {
         window.mouse = { x: evt.clientX, y: evt.clientY };
         }
         */

        /**
         * SUBROUTINE for preventPrematureSlideClose option
         *
         * @param {Object}        evt
         * @param {Object=}        el
         */
        ,    isMouseOverElem: function (evt, el) {
            var
                    $E = $(el || this)
                    ,    d = $E.offset()
                    ,    T = d.top
                    ,    L = d.left
                    ,    R = L + $E.outerWidth()
                    ,    B = T + $E.outerHeight()
                    ,    x = evt.pageX    // evt.clientX ?
                    ,    y = evt.pageY    // evt.clientY ?
                    ;
            // if X & Y are < 0, probably means is over an open SELECT
            return ($.layout.browser.msie && x < 0 && y < 0) || ((x >= L && x <= R) && (y >= T && y <= B));
        }

    };

    $.fn.layout = function (opts) {

        /*
         * ###########################
         *   WIDGET CONFIG & OPTIONS
         * ###########################
         */
        var

            // LANGUAGE - for tips & messages
                lang = $.layout.language // internal alias

            // DEFAULT OPTIONS - CHANGE IF DESIRED
                ,    options = {
            name:                        ""            // Not required, but useful for buttons and used for the state-cookie
            ,    containerClass:                "ui-layout-container" // layout-container element
            ,    scrollToBookmarkOnLoad:        true        // after creating a layout, scroll to bookmark in URL (.../page.htm#myBookmark)
            ,    resizeWithWindow:            true        // bind thisLayout.resizeAll() to the window.resize event
            ,    resizeWithWindowDelay:        200            // delay calling resizeAll because makes window resizing very jerky
            ,    resizeWithWindowMaxDelay:    0            // 0 = none - force resize every XX ms while window is being resized
            ,    onresizeall_start:            null        // CALLBACK when resizeAll() STARTS	- NOT pane-specific
            ,    onresizeall_end:            null        // CALLBACK when resizeAll() ENDS	- NOT pane-specific
            ,    onload_start:                null        // CALLBACK when Layout inits - after options initialized, but before elements
            ,    onload_end:                    null        // CALLBACK when Layout inits - after EVERYTHING has been initialized
            ,    onunload_start:                null        // CALLBACK when Layout is destroyed OR onWindowUnload
            ,    onunload_end:                null        // CALLBACK when Layout is destroyed OR onWindowUnload
            ,    autoBindCustomButtons:        false        // search for buttons with ui-layout-button class and auto-bind them
            ,    zIndex:                        null        // the PANE zIndex - resizers and masks will be +1
            ,    initPanes:                    true        // false = DO NOT initialize the panes onLoad - will init later
            ,    showErrorMessages:            true        // enables fatal error messages to warn developers of common errors
            //	PANE SETTINGS
            ,    defaults: { // default options for 'all panes' - will be overridden by 'per-pane settings'
                applyDemoStyles:         false        // NOTE: renamed from applyDefaultStyles for clarity
                ,    closable:                true        // pane can open & close
                ,    resizable:                true        // when open, pane can be resized
                ,    slidable:                true        // when closed, pane can 'slide open' over other panes - closes on mouse-out
                ,    initClosed:                false        // true = init pane as 'closed'
                ,    initHidden:             false         // true = init pane as 'hidden' - no resizer-bar/spacing
                //	SELECTORS
                //,	paneSelector:			""			// MUST be pane-specific - jQuery selector for pane
                ,    contentSelector:        ".ui-layout-content" // INNER div/element to auto-size so only it scrolls, not the entire pane!
                ,    contentIgnoreSelector:    ".ui-layout-ignore"    // element(s) to 'ignore' when measuring 'content'
                ,    findNestedContent:        false        // true = $P.find(contentSelector), false = $P.children(contentSelector)
                //	GENERIC ROOT-CLASSES - for auto-generated classNames
                ,    paneClass:                "ui-layout-pane"    // border-Pane - default: 'ui-layout-pane'
                ,    resizerClass:            "ui-layout-resizer"    // Resizer Bar		- default: 'ui-layout-resizer'
                ,    togglerClass:            "ui-layout-toggler"    // Toggler Button	- default: 'ui-layout-toggler'
                ,    buttonClass:            "ui-layout-button"    // CUSTOM Buttons	- default: 'ui-layout-button-toggle/-open/-close/-pin'
                //	ELEMENT SIZE & SPACING
                //,	size:					100			// MUST be pane-specific -initial size of pane
                ,    minSize:                0            // when manually resizing a pane
                ,    maxSize:                0            // ditto, 0 = no limit
                ,    spacing_open:            6            // space between pane and adjacent panes - when pane is 'open'
                ,    spacing_closed:            6            // ditto - when pane is 'closed'
                ,    togglerLength_open:        50            // Length = WIDTH of toggler button on north/south sides - HEIGHT on east/west sides
                ,    togglerLength_closed:     50            // 100% OR -1 means 'full height/width of resizer bar' - 0 means 'hidden'
                ,    togglerAlign_open:        "center"    // top/left, bottom/right, center, OR...
                ,    togglerAlign_closed:    "center"    // 1 => nn = offset from top/left, -1 => -nn == offset from bottom/right
                ,    togglerTip_open:        lang.Close    // Toggler tool-tip (title)
                ,    togglerTip_closed:        lang.Open    // ditto
                ,    togglerContent_open:    ""            // text or HTML to put INSIDE the toggler
                ,    togglerContent_closed:    ""            // ditto
                //	RESIZING OPTIONS
                ,    resizerDblClickToggle:    true        //
                ,    autoResize:                true        // IF size is 'auto' or a percentage, then recalc 'pixel size' whenever the layout resizes
                ,    autoReopen:                true        // IF a pane was auto-closed due to noRoom, reopen it when there is room? False = leave it closed
                ,    resizerDragOpacity:        1            // option for ui.draggable
                //,	resizerCursor:			""			// MUST be pane-specific - cursor when over resizer-bar
                ,    maskIframesOnResize:    true        // true = all iframes OR = iframe-selector(s) - adds masking-div during resizing/dragging
                ,    resizeNestedLayout:        true        // true = trigger nested.resizeAll() when a 'pane' of this layout is the 'container' for another
                ,    resizeWhileDragging:    false        // true = LIVE Resizing as resizer is dragged
                ,    resizeContentWhileDragging:    false    // true = re-measure header/footer heights as resizer is dragged
                //	TIPS & MESSAGES - also see lang object
                ,    noRoomToOpenTip:        lang.noRoomToOpenTip
                ,    resizerTip:                lang.Resize    // Resizer tool-tip (title)
                ,    sliderTip:                lang.Slide    // resizer-bar triggers 'sliding' when pane is closed
                ,    sliderCursor:            "pointer"    // cursor when resizer-bar will trigger 'sliding'
                ,    slideTrigger_open:        "click"        // click, dblclick, mouseenter
                ,    slideTrigger_close:        "mouseleave"// click, mouseleave
                ,    slideDelay_open:        300            // applies only for mouseenter event - 0 = instant open
                ,    slideDelay_close:        300            // applies only for mouseleave event (300ms is the minimum!)
                ,    hideTogglerOnSlide:        false        // when pane is slid-open, should the toggler show?
                ,    preventQuickSlideClose:    $.layout.browser.webkit // Chrome triggers slideClosed as it is opening
                ,    preventPrematureSlideClose: false
                //	HOT-KEYS & MISC
                ,    showOverflowOnHover:    false        // will bind allowOverflow() utility to pane.onMouseOver
                ,    enableCursorHotkey:        true        // enabled 'cursor' hotkeys
                //,	customHotkey:			""			// MUST be pane-specific - EITHER a charCode OR a character
                ,    customHotkeyModifier:    "SHIFT"        // either 'SHIFT', 'CTRL' or 'CTRL+SHIFT' - NOT 'ALT'
                //	PANE ANIMATION
                //	NOTE: fxSss_open & fxSss_close options (eg: fxName_open) are auto-generated if not passed
                ,    fxName:                    "slide"     // ('none' or blank), slide, drop, scale
                ,    fxSpeed:                null        // slow, normal, fast, 200, nnn - if passed, will OVERRIDE fxSettings.duration
                ,    fxSettings:                {}            // can be passed, eg: { easing: "easeOutBounce", duration: 1500 }
                ,    fxOpacityFix:            true        // tries to fix opacity in IE to restore anti-aliasing after animation
                //	CALLBACKS
                ,    triggerEventsOnLoad:    false        // true = trigger onopen OR onclose callbacks when layout initializes
                ,    triggerEventsWhileDragging: true    // true = trigger onresize callback REPEATEDLY if resizeWhileDragging==true
                ,    onshow_start:            null        // CALLBACK when pane STARTS to Show	- BEFORE onopen/onhide_start
                ,    onshow_end:                null        // CALLBACK when pane ENDS being Shown	- AFTER  onopen/onhide_end
                ,    onhide_start:            null        // CALLBACK when pane STARTS to Close	- BEFORE onclose_start
                ,    onhide_end:                null        // CALLBACK when pane ENDS being Closed	- AFTER  onclose_end
                ,    onopen_start:            null        // CALLBACK when pane STARTS to Open
                ,    onopen_end:                null        // CALLBACK when pane ENDS being Opened
                ,    onclose_start:            null        // CALLBACK when pane STARTS to Close
                ,    onclose_end:            null        // CALLBACK when pane ENDS being Closed
                ,    onresize_start:            null        // CALLBACK when pane STARTS being Resized ***FOR ANY REASON***
                ,    onresize_end:            null        // CALLBACK when pane ENDS being Resized ***FOR ANY REASON***
                ,    onsizecontent_start:    null        // CALLBACK when sizing of content-element STARTS
                ,    onsizecontent_end:        null        // CALLBACK when sizing of content-element ENDS
                ,    onswap_start:            null        // CALLBACK when pane STARTS to Swap
                ,    onswap_end:                null        // CALLBACK when pane ENDS being Swapped
                ,    ondrag_start:            null        // CALLBACK when pane STARTS being ***MANUALLY*** Resized
                ,    ondrag_end:                null        // CALLBACK when pane ENDS being ***MANUALLY*** Resized
            }
            ,    north: {
                paneSelector:            ".ui-layout-north"
                ,    size:                    "auto"        // eg: "auto", "30%", 200
                ,    resizerCursor:            "n-resize"    // custom = url(myCursor.cur)
                ,    customHotkey:            ""            // EITHER a charCode OR a character
            }
            ,    south: {
                paneSelector:            ".ui-layout-south"
                ,    size:                    "auto"
                ,    resizerCursor:            "s-resize"
                ,    customHotkey:            ""
            }
            ,    east: {
                paneSelector:            ".ui-layout-east"
                ,    size:                    200
                ,    resizerCursor:            "e-resize"
                ,    customHotkey:            ""
            }
            ,    west: {
                paneSelector:            ".ui-layout-west"
                ,    size:                    200
                ,    resizerCursor:            "w-resize"
                ,    customHotkey:            ""
            }
            ,    center: {
                paneSelector:            ".ui-layout-center"
                ,    minWidth:                0
                ,    minHeight:                0
            }

            //	STATE MANAGMENT
            ,    useStateCookie:                false        // Enable cookie-based state-management - can fine-tune with cookie.autoLoad/autoSave
            ,    cookie: {
                name:                    ""            // If not specified, will use Layout.name, else just "Layout"
                ,    autoSave:                true        // Save a state cookie when page exits?
                ,    autoLoad:                true        // Load the state cookie when Layout inits?
                //	Cookie Options
                ,    domain:                    ""
                ,    path:                    ""
                ,    expires:                ""            // 'days' to keep cookie - leave blank for 'session cookie'
                ,    secure:                    false
                //	List of options to save in the cookie - must be pane-specific
                ,    keys:                    "north.size,south.size,east.size,west.size," +
                                              "north.isClosed,south.isClosed,east.isClosed,west.isClosed," +
                                              "north.isHidden,south.isHidden,east.isHidden,west.isHidden"
            }
        }


            // PREDEFINED EFFECTS / DEFAULTS
                ,    effects = { // LIST *PREDEFINED EFFECTS* HERE, even if effect has no settings
            slide:    {
                all:    { duration:  "fast"    } // eg: duration: 1000, easing: "easeOutBounce"
                ,    north:    { direction: "up"    }
                ,    south:    { direction: "down"    }
                ,    east:    { direction: "right"}
                ,    west:    { direction: "left"    }
            }
            ,    drop:    {
                all:    { duration:  "slow"    } // eg: duration: 1000, easing: "easeOutQuint"
                ,    north:    { direction: "up"    }
                ,    south:    { direction: "down"    }
                ,    east:    { direction: "right"}
                ,    west:    { direction: "left"    }
            }
            ,    scale:    {
                all:    { duration:  "fast"    }
            }
        }


            // DYNAMIC DATA - IS READ-ONLY EXTERNALLY!
                ,    state = {
            // generate unique ID to use for event.namespace so can unbind only events added by 'this layout'
            id:            "layout" + new Date().getTime()    // code uses alias: sID
            ,    initialized: false
            ,    container:    {} // init all keys
            ,    north:        {}
            ,    south:        {}
            ,    east:        {}
            ,    west:        {}
            ,    center:        {}
            ,    cookie:        {} // State Managment data storage
        }


            // INTERNAL CONFIG DATA - DO NOT CHANGE THIS!
                ,    _c = {
            allPanes:        "north,south,west,east,center"
            ,    borderPanes:    "north,south,west,east"
            ,    altSide: {
                north:    "south"
                ,    south:    "north"
                ,    east:     "west"
                ,    west:     "east"
            }
            //	CSS used in multiple places
            ,    hidden:  { visibility: "hidden" }
            ,    visible: { visibility: "visible" }
            //	layout element settings
            ,    zIndex: { // set z-index values here
                pane_normal:    1        // normal z-index for panes
                ,    resizer_normal:    2        // normal z-index for resizer-bars
                ,    iframe_mask:    2        // overlay div used to mask pane(s) during resizing
                ,    pane_sliding:    100        // applied to *BOTH* the pane and its resizer when a pane is 'slid open'
                ,    pane_animate:    1000    // applied to the pane when being animated - not applied to the resizer
                ,    resizer_drag:    10000    // applied to the CLONED resizer-bar when being 'dragged'
            }
            ,    resizers: {
                cssReq: {
                    position:     "absolute"
                    ,    padding:     0
                    ,    margin:     0
                    ,    fontSize:    "1px"
                    ,    textAlign:    "left"    // to counter-act "center" alignment!
                    ,    overflow:     "hidden" // prevent toggler-button from overflowing
                    //	SEE c.zIndex.resizer_normal
                }
                ,    cssDemo: { // DEMO CSS - applied if: options.PANE.applyDemoStyles=true
                    background: "#DDD"
                    ,    border:        "none"
                }
            }
            ,    togglers: {
                cssReq: {
                    position:     "absolute"
                    ,    display:     "block"
                    ,    padding:     0
                    ,    margin:     0
                    ,    overflow:    "hidden"
                    ,    textAlign:    "center"
                    ,    fontSize:    "1px"
                    ,    cursor:     "pointer"
                    ,    zIndex:     1
                }
                ,    cssDemo: { // DEMO CSS - applied if: options.PANE.applyDemoStyles=true
                    background: "#AAA"
                }
            }
            ,    content: {
                cssReq: {
                    position:    "relative" /* contain floated or positioned elements */
                }
                ,    cssDemo: { // DEMO CSS - applied if: options.PANE.applyDemoStyles=true
                    overflow:    "auto"
                    ,    padding:    "10px"
                }
                ,    cssDemoPane: { // DEMO CSS - REMOVE scrolling from 'pane' when it has a content-div
                    overflow:    "hidden"
                    ,    padding:    0
                }
            }
            ,    panes: { // defaults for ALL panes - overridden by 'per-pane settings' below
                cssReq: {
                    position:     "absolute"
                    ,    margin:        0
                    //	SEE c.zIndex.pane_normal
                }
                ,    cssDemo: { // DEMO CSS - applied if: options.PANE.applyDemoStyles=true
                    padding:    "10px"
                    ,    background:    "#FFF"
                    ,    border:        "1px solid #BBB"
                    ,    overflow:    "auto"
                }
            }
            ,    north: {
                side:            "Top"
                ,    sizeType:        "Height"
                ,    dir:            "horz"
                ,    cssReq: {
                    top:         0
                    ,    bottom:     "auto"
                    ,    left:         0
                    ,    right:         0
                    ,    width:         "auto"
                    //	height: 	DYNAMIC
                }
                ,    pins:            []    // array of 'pin buttons' to be auto-updated on open/close (classNames)
            }
            ,    south: {
                side:            "Bottom"
                ,    sizeType:        "Height"
                ,    dir:            "horz"
                ,    cssReq: {
                    top:         "auto"
                    ,    bottom:     0
                    ,    left:         0
                    ,    right:         0
                    ,    width:         "auto"
                    //	height: 	DYNAMIC
                }
                ,    pins:            []
            }
            ,    east: {
                side:            "Right"
                ,    sizeType:        "Width"
                ,    dir:            "vert"
                ,    cssReq: {
                    left:         "auto"
                    ,    right:         0
                    ,    top:         "auto" // DYNAMIC
                    ,    bottom:     "auto" // DYNAMIC
                    ,    height:     "auto"
                    //	width: 		DYNAMIC
                }
                ,    pins:            []
            }
            ,    west: {
                side:            "Left"
                ,    sizeType:        "Width"
                ,    dir:            "vert"
                ,    cssReq: {
                    left:         0
                    ,    right:         "auto"
                    ,    top:         "auto" // DYNAMIC
                    ,    bottom:     "auto" // DYNAMIC
                    ,    height:     "auto"
                    //	width: 		DYNAMIC
                }
                ,    pins:            []
            }
            ,    center: {
                dir:            "center"
                ,    cssReq: {
                    left:         "auto" // DYNAMIC
                    ,    right:         "auto" // DYNAMIC
                    ,    top:         "auto" // DYNAMIC
                    ,    bottom:     "auto" // DYNAMIC
                    ,    height:     "auto"
                    ,    width:         "auto"
                }
            }
        }


            /*
             * ###########################
             *  INTERNAL HELPER FUNCTIONS
             * ###########################
             */

            /**
             * Manages all internal timers
             */
                ,    timer = {
            data:    {}
            ,    set:    function (s, fn, ms) {
                timer.clear(s);
                timer.data[s] = setTimeout(fn, ms);
            }
            ,    clear:    function (s) {
                var t = timer.data;
                if (t[s]) {
                    clearTimeout(t[s]);
                    delete t[s];
                }
            }
        }

            /**
             * Returns true if passed param is EITHER a simple string OR a 'string object' - otherwise returns false
             */
                ,    isStr = function (o) {
            try {
                return typeof o == "string"
                        || (typeof o == "object" && o.constructor.toString().match(/string/i) !== null);
            }
            catch (e) {
                return false;
            }
        }

            /**
             * Returns a simple string if passed EITHER a simple string OR a 'string object',
             * else returns the original object
             */
                ,    str = function (o) { // trim converts 'String object' to a simple string
            return isStr(o) ? $.trim(o) : o == undefined || o == null ? "" : o;
        }

            /**
             * min / max
             *
             * Aliases for Math methods to simplify coding
             */
                ,    min = function (x, y) {
            return Math.min(x, y);
        }
                ,    max = function (x, y) {
            return Math.max(x, y);
        }

            /**
             * Processes the options passed in and transforms them into the format used by layout()
             * Missing keys are added, and converts the data if passed in 'flat-format' (no sub-keys)
             * In flat-format, pane-specific-settings are prefixed like: north__optName  (2-underscores)
             * To update effects, options MUST use nested-keys format, with an effects key ???
             *
             * @see    initOptions()
             * @param    {Object}    d    Data/options passed by user - may be a single level or nested levels
             * @return    {Object}        Creates a data struture that perfectly matches 'options', ready to be imported
             */
                ,    _transformData = function (d) {
            var a, json = { cookie:{}, defaults:{fxSettings:{}}, north:{fxSettings:{}}, south:{fxSettings:{}}, east:{fxSettings:{}}, west:{fxSettings:{}}, center:{fxSettings:{}} };
            d = d || {};
            if (d.effects || d.cookie || d.defaults || d.north || d.south || d.west || d.east || d.center)
                json = $.extend(true, json, d); // already in json format - add to base keys
            else
            // convert 'flat' to 'nest-keys' format - also handles 'empty' user-options
                $.each(d, function (key, val) {
                    a = key.split("__");
                    if (!a[1] || json[a[0]]) // check for invalid keys
                        json[ a[1] ? a[0] : "defaults" ][ a[1] ? a[1] : a[0] ] = val;
                });
            return json;
        }

            /**
             * Set an INTERNAL callback to avoid simultaneous animation
             * Runs only if needed and only if all callbacks are not 'already set'
             * Called by open() and close() when isLayoutBusy=true
             *
             * @param {string}        action    Either 'open' or 'close'
             * @param {string}        pane    A valid border-pane name, eg 'west'
             * @param {boolean=}        param    Extra param for callback (optional)
             */
                ,    _queue = function (action, pane, param) {
            var tried = [];

            // if isLayoutBusy, then some pane must be 'moving'
            $.each(_c.borderPanes.split(","), function (i, p) {
                if (_c[p].isMoving) {
                    bindCallback(p); // TRY to bind a callback
                    return false;	// BREAK
                }
            });

            // if pane does NOT have a callback, then add one, else follow the callback chain...
            function bindCallback(p) {
                var c = _c[p];
                if (!c.doCallback) {
                    c.doCallback = true;
                    c.callback = action + "," + pane + "," + (param ? 1 : 0);
                }
                else { // try to 'chain' this callback
                    tried.push(p);
                    var cbPane = c.callback.split(",")[1]; // 2nd param of callback is 'pane'
                    // ensure callback target NOT 'itself' and NOT 'target pane' and NOT already tried (avoid loop)
                    if (cbPane != pane && !$.inArray(cbPane, tried) >= 0)
                        bindCallback(cbPane); // RECURSE
                }
            }
        }

            /**
             * RUN the INTERNAL callback for this pane - if one exists
             *
             * @param {string}    pane    A valid border-pane name, eg 'west'
             */
                ,    _dequeue = function (pane) {
            var c = _c[pane];

            // RESET flow-control flags
            _c.isLayoutBusy = false;
            delete c.isMoving;
            if (!c.doCallback || !c.callback) return;

            c.doCallback = false; // RESET logic flag

            // EXECUTE the callback
            var
                    cb = c.callback.split(",")
                    ,    param = (cb[2] > 0 ? true : false)
                    ;
            if (cb[0] == "open")
                open(cb[1], param);
            else if (cb[0] == "close")
                close(cb[1], param);

            if (!c.doCallback) c.callback = null; // RESET - unless callback above enabled it again!
        }

            /**
             * Executes a Callback function after a trigger event, like resize, open or close
             *
             * @param {?string}                pane    This is passed only so we can pass the 'pane object' to the callback
             * @param {(string|function())}    v_fn    Accepts a function name, OR a comma-delimited array: [0]=function name, [1]=argument
             */
                ,    _execCallback = function (pane, v_fn) {
            if (!v_fn) return;
            var fn;
            try {
                if (typeof v_fn == "function")
                    fn = v_fn;
                else if (!isStr(v_fn))
                    return;
                else if (v_fn.match(/,/)) {
                        // function name cannot contain a comma, so must be a function name AND a 'name' parameter
                        var args = v_fn.split(",");
                        fn = eval(args[0]);
                        if (typeof fn == "function" && args.length > 1)
                            return fn(args[1]); // pass the argument parsed from 'list'
                    }
                    else // just the name of an external function?
                        fn = eval(v_fn);

                if (typeof fn == "function") {
                    if (pane && $Ps[pane])
                    // pass data: pane-name, pane-element, pane-state, pane-options, and layout-name
                        return fn(pane, $Ps[pane], state[pane], options[pane], options.name);
                    else // must be a layout/container callback - pass suitable info
                        return fn(Instance, state, options, options.name);
                }
            }
            catch (ex) {
            }
        }

            /**
             * cure iframe display issues in IE & other browsers
             */
                ,    _fixIframe = function (pane) {
            if ($.layout.browser.mozilla) return; // skip FireFox - it auto-refreshes iframes onShow
            var $P = $Ps[pane];
            // if the 'pane' is an iframe, do it
            if (state[pane].tagName == "IFRAME")
                $P.css(_c.hidden).css(_c.visible);
            else // ditto for any iframes INSIDE the pane
                $P.find('IFRAME').css(_c.hidden).css(_c.visible);
        }

            /**
             * cssW / cssH / cssSize / cssMinDims
             *
             * Contains logic to check boxModel & browser, and return the correct width/height for the current browser/doctype
             *
             * @see  initPanes(), sizeMidPanes(), initHandles(), sizeHandles()
             * @param  {(string|!Object)}    el            Can accept a 'pane' (east, west, etc) OR a DOM object OR a jQuery object
             * @param  {number=}                outerWidth    (optional) Can pass a width, allowing calculations BEFORE element is resized
             * @return {number}                            Returns the innerWidth of el by subtracting padding and borders
             */
                ,    cssW = function (el, outerWidth) {
            var str = isStr(el)
                    ,    $E = str ? $Ps[el] : $(el)
                    ;
            if (!$E.length) return 0;
            if (isNaN(outerWidth)) // not specified
                outerWidth = str ? getPaneSize(el) : $E.outerWidth();
            return $.layout.cssWidth($E, outerWidth);
        }

            /**
             * @param  {(string|!Object)}    el            Can accept a 'pane' (east, west, etc) OR a DOM object OR a jQuery object
             * @param  {number=}                outerHeight    (optional) Can pass a width, allowing calculations BEFORE element is resized
             * @return {number}                Returns the innerHeight el by subtracting padding and borders
             */
                ,    cssH = function (el, outerHeight) {
            var str = isStr(el)
                    ,    $E = str ? $Ps[el] : $(el)
                    ;
            if (!$E.length) return 0;
            if (isNaN(outerHeight)) // not specified
                outerHeight = str ? getPaneSize(el) : $E.outerHeight();
            return $.layout.cssHeight($E, outerHeight);
        }

            /**
             * @param  {string}        pane        Can accept ONLY a 'pane' (east, west, etc)
             * @param  {number=}        outerSize    (optional) Can pass a width, allowing calculations BEFORE element is resized
             * @return {number}        Returns the innerHeight/Width of el by subtracting padding and borders
             */
                ,    cssSize = function (pane, outerSize) {
            if (_c[pane].dir == "horz") // pane = north or south
                return cssH(pane, outerSize);
            else // pane = east or west
                return cssW(pane, outerSize);
        }

            /**
             * @param  {string}        pane        Can accept ONLY a 'pane' (east, west, etc)
             * @return {Object}        Returns hash of minWidth & minHeight
             */
                ,    cssMinDims = function (pane) {
            // minWidth/Height means CSS width/height = 1px
            var
                    dir = _c[pane].dir
                    ,    d = {
                minWidth:    1001 - cssW(pane, 1000)
                ,    minHeight:    1001 - cssH(pane, 1000)
            }
                    ;
            if (dir == "horz") d.minSize = d.minHeight;
            if (dir == "vert") d.minSize = d.minWidth;
            return d;
        }

            // TODO: see if these methods can be made more useful...
            // TODO: *maybe* return cssW/H from these so caller can use this info

            /**
             * @param {(string|!Object)}        el
             * @param {number=}                outerWidth
             * @param {boolean=}                autoHide
             */
                ,    setOuterWidth = function (el, outerWidth, autoHide) {
            var $E = el, w;
            if (isStr(el)) $E = $Ps[el]; // west
            else if (!el.jquery) $E = $(el);
            w = cssW($E, outerWidth);
            $E.css({ width: w });
            if (w > 0) {
                if (autoHide && $E.data('autoHidden') && $E.innerHeight() > 0) {
                    $E.show().data('autoHidden', false);
                    if (!$.layout.browser.mozilla) // FireFox refreshes iframes - IE does not
                    // make hidden, then visible to 'refresh' display after animation
                        $E.css(_c.hidden).css(_c.visible);
                }
            }
            else if (autoHide && !$E.data('autoHidden'))
                $E.hide().data('autoHidden', true);
        }

            /**
             * @param {(string|!Object)}        el
             * @param {number=}                outerHeight
             * @param {boolean=}                autoHide
             */
                ,    setOuterHeight = function (el, outerHeight, autoHide) {
            var $E = el, h;
            if (isStr(el)) $E = $Ps[el]; // west
            else if (!el.jquery) $E = $(el);
            h = cssH($E, outerHeight);
            $E.css({ height: h, visibility: "visible" }); // may have been 'hidden' by sizeContent
            if (h > 0 && $E.innerWidth() > 0) {
                if (autoHide && $E.data('autoHidden')) {
                    $E.show().data('autoHidden', false);
                    if (!$.layout.browser.mozilla) // FireFox refreshes iframes - IE does not
                        $E.css(_c.hidden).css(_c.visible);
                }
            }
            else if (autoHide && !$E.data('autoHidden'))
                $E.hide().data('autoHidden', true);
        }

            /**
             * @param {(string|!Object)}        el
             * @param {number=}                outerSize
             * @param {boolean=}                autoHide
             */
                ,    setOuterSize = function (el, outerSize, autoHide) {
            if (_c[pane].dir == "horz") // pane = north or south
                setOuterHeight(el, outerSize, autoHide);
            else // pane = east or west
                setOuterWidth(el, outerSize, autoHide);
        }


            /**
             * Converts any 'size' params to a pixel/integer size, if not already
             * If 'auto' or a decimal/percentage is passed as 'size', a pixel-size is calculated
             *
             /**
             * @param  {string}                pane
             * @param  {(string|number)=}    size
             * @param  {string=}                dir
             * @return {number}
             */
                ,    _parseSize = function (pane, size, dir) {
            if (!dir) dir = _c[pane].dir;

            if (isStr(size) && size.match(/%/))
                size = parseInt(size, 10) / 100; // convert % to decimal

            if (size === 0)
                return 0;
            else if (size >= 1)
                return parseInt(size, 10);
            else if (size > 0) { // percentage, eg: .25
                    var o = options, avail;
                    if (dir == "horz") // north or south or center.minHeight
                        avail = sC.innerHeight - ($Ps.north ? o.north.spacing_open : 0) - ($Ps.south ? o.south.spacing_open : 0);
                    else if (dir == "vert") // east or west or center.minWidth
                        avail = sC.innerWidth - ($Ps.west ? o.west.spacing_open : 0) - ($Ps.east ? o.east.spacing_open : 0);
                    return Math.floor(avail * size);
                }
                else if (pane == "center")
                        return 0;
                    else { // size < 0 || size=='auto' || size==Missing || size==Invalid
                        // auto-size the pane
                        var
                                $P = $Ps[pane]
                                ,    dim = (dir == "horz" ? "height" : "width")
                                ,    vis = $.layout.showInvisibly($P) // show pane invisibly if hidden
                                ,    s = $P.css(dim); // SAVE current size
                        ;
                        $P.css(dim, "auto");
                        size = (dim == "height") ? $P.outerHeight() : $P.outerWidth(); // MEASURE
                        $P.css(dim, s).css(vis); // RESET size & visibility
                        return size;
                    }
        }

            /**
             * Calculates current 'size' (outer-width or outer-height) of a border-pane - optionally with 'pane-spacing' added
             *
             * @param  {(string|!Object)}    pane
             * @param  {boolean=}            inclSpace
             * @return {number}                Returns EITHER Width for east/west panes OR Height for north/south panes - adjusted for boxModel & browser
             */
                ,    getPaneSize = function (pane, inclSpace) {
            var
                    $P = $Ps[pane]
                    ,    o = options[pane]
                    ,    s = state[pane]
                    ,    oSp = (inclSpace ? o.spacing_open : 0)
                    ,    cSp = (inclSpace ? o.spacing_closed : 0)
                    ;
            if (!$P || s.isHidden)
                return 0;
            else if (s.isClosed || (s.isSliding && inclSpace))
                return cSp;
            else if (_c[pane].dir == "horz")
                    return $P.outerHeight() + oSp;
                else // dir == "vert"
                    return $P.outerWidth() + oSp;
        }

            /**
             * Calculate min/max pane dimensions and limits for resizing
             *
             * @param  {string}        pane
             * @param  {boolean=}    slide
             */
                ,    setSizeLimits = function (pane, slide) {
            if (!isInitialized()) return;
            var
                    o = options[pane]
                    ,    s = state[pane]
                    ,    c = _c[pane]
                    ,    dir = c.dir
                    ,    side = c.side.toLowerCase()
                    ,    type = c.sizeType.toLowerCase()
                    ,    isSliding = (slide != undefined ? slide : s.isSliding) // only open() passes 'slide' param
                    ,    $P = $Ps[pane]
                    ,    paneSpacing = o.spacing_open
                //	measure the pane on the *opposite side* from this pane
                    ,    altPane = _c.altSide[pane]
                    ,    altS = state[altPane]
                    ,    $altP = $Ps[altPane]
                    ,    altPaneSize = (!$altP || altS.isVisible === false || altS.isSliding ? 0 : (dir == "horz" ? $altP.outerHeight() : $altP.outerWidth()))
                    ,    altPaneSpacing = ((!$altP || altS.isHidden ? 0 : options[altPane][ altS.isClosed !== false ? "spacing_closed" : "spacing_open" ]) || 0)
                //	limitSize prevents this pane from 'overlapping' opposite pane
                    ,    containerSize = (dir == "horz" ? sC.innerHeight : sC.innerWidth)
                    ,    minCenterDims = cssMinDims("center")
                    ,    minCenterSize = dir == "horz" ? max(options.center.minHeight, minCenterDims.minHeight) : max(options.center.minWidth, minCenterDims.minWidth)
                //	if pane is 'sliding', then ignore center and alt-pane sizes - because 'overlays' them
                    ,    limitSize = (containerSize - paneSpacing - (isSliding ? 0 : (_parseSize("center", minCenterSize, dir) + altPaneSize + altPaneSpacing)))
                    ,    minSize = s.minSize = max(_parseSize(pane, o.minSize), cssMinDims(pane).minSize)
                    ,    maxSize = s.maxSize = min((o.maxSize ? _parseSize(pane, o.maxSize) : 100000), limitSize)
                    ,    r = s.resizerPosition = {} // used to set resizing limits
                    ,    top = sC.insetTop
                    ,    left = sC.insetLeft
                    ,    W = sC.innerWidth
                    ,    H = sC.innerHeight
                    ,    rW = o.spacing_open // subtract resizer-width to get top/left position for south/east
                    ;
            switch (pane) {
                case "north":    r.min = top + minSize;
                    r.max = top + maxSize;
                    break;
                case "west":    r.min = left + minSize;
                    r.max = left + maxSize;
                    break;
                case "south":    r.min = top + H - maxSize - rW;
                    r.max = top + H - minSize - rW;
                    break;
                case "east":    r.min = left + W - maxSize - rW;
                    r.max = left + W - minSize - rW;
                    break;
            }
            ;
        }

            /**
             * Returns data for setting the size/position of center pane. Also used to set Height for east/west panes
             *
             * @return JSON  Returns a hash of all dimensions: top, bottom, left, right, (outer) width and (outer) height
             */
                ,    calcNewCenterPaneDims = function () {
            var d = {
                top:    getPaneSize("north", true) // true = include 'spacing' value for pane
                ,    bottom:    getPaneSize("south", true)
                ,    left:    getPaneSize("west", true)
                ,    right:    getPaneSize("east", true)
                ,    width:    0
                ,    height:    0
            };

            // NOTE: sC = state.container
            // calc center-pane outer dimensions
            d.width = sC.innerWidth - d.left - d.right;  // outerWidth
            d.height = sC.innerHeight - d.bottom - d.top; // outerHeight
            // add the 'container border/padding' to get final positions relative to the container
            d.top += sC.insetTop;
            d.bottom += sC.insetBottom;
            d.left += sC.insetLeft;
            d.right += sC.insetRight;

            return d;
        }


            /**
             * Returns data for setting size of an element (container or a pane).
             *
             * @see  _create(), onWindowResize() for container, plus others for pane
             * @return JSON  Returns a hash of all dimensions: top, bottom, left, right, outerWidth, innerHeight, etc
             */
                ,    elDims = function ($E) {
            return $.layout.getElementDimensions($E);
        }

                ,    elCSS = function ($E, list) {
            return $.layout.getElementCSS($E, list);
        }


            /**
             * @param {!Object}        el
             * @param {boolean=}        allStates
             */
                ,    getHoverClasses = function (el, allStates) {
            var
                    $El = $(el)
                    ,    type = $El.data("layoutRole")
                    ,    pane = $El.data("layoutEdge")
                    ,    o = options[pane]
                    ,    root = o[type + "Class"]
                    ,    _pane = "-" + pane // eg: "-west"
                    ,    _open = "-open"
                    ,    _closed = "-closed"
                    ,    _slide = "-sliding"
                    ,    _hover = "-hover " // NOTE the trailing space
                    ,    _state = $El.hasClass(root + _closed) ? _closed : _open
                    ,    _alt = _state == _closed ? _open : _closed
                    ,    classes = (root + _hover) + (root + _pane + _hover) + (root + _state + _hover) + (root + _pane + _state + _hover)
                    ;
            if (allStates) // when 'removing' classes, also remove alternate-state classes
                classes += (root + _alt + _hover) + (root + _pane + _alt + _hover);

            if (type == "resizer" && $El.hasClass(root + _slide))
                classes += (root + _slide + _hover) + (root + _pane + _slide + _hover);

            return $.trim(classes);
        }
                ,    addHover = function (evt, el) {
            var $E = $(el || this);
            if (evt && $E.data("layoutRole") == "toggler")
                evt.stopPropagation(); // prevent triggering 'slide' on Resizer-bar
            $E.addClass(getHoverClasses($E));
        }
                ,    removeHover = function (evt, el) {
            var $E = $(el || this);
            $E.removeClass(getHoverClasses($E, true));
        }

                ,    onResizerEnter = function (evt) {
            $('body').disableSelection();
            addHover(evt, this);
        }
                ,    onResizerLeave = function (evt, el) {
            var
                    e = el || this // el is only passed when called by the timer
                    ,    pane = $(e).data("layoutEdge")
                    ,    name = pane + "ResizerLeave"
                    ;
            timer.clear(pane + "_openSlider"); // cancel slideOpen timer, if set
            timer.clear(name); // cancel enableSelection timer - may re/set below
            if (!el) { // 1st call - mouseleave event
                removeHover(evt, this); // do this on initial call
                // this method calls itself on a timer because it needs to allow
                // enough time for dragging to kick-in and set the isResizing flag
                // dragging has a 100ms delay set, so this delay must be higher
                timer.set(name, function() {
                    onResizerLeave(evt, e);
                }, 200);
            }
            // if user is resizing, then dragStop will enableSelection() when done
            else if (!state[pane].isResizing) // 2nd call - by timer
                $('body').enableSelection();
        }

            /*
             * ###########################
             *   INITIALIZATION METHODS
             * ###########################
             */

            /**
             * Initialize the layout - called automatically whenever an instance of layout is created
             *
             * @see  none - triggered onInit
             * @return  mixed    true = fully initialized | false = panes not initialized (yet) | 'cancel' = abort
             */
                ,    _create = function () {
            // initialize config/options
            initOptions();
            var o = options;

            $.layout.browser.boxModel = $.support.boxModel;

            // update options with saved state, if option enabled
            if (o.useStateCookie && o.cookie.autoLoad)
                loadCookie(); // Update options from state-cookie

            // TEMP state so isInitialized returns true during init process
            state.creatingLayout = true;

            // options & state have been initialized, so now run beforeLoad callback
            // onload will CANCEL layout creation if it returns false
            if (false === _execCallback(null, o.onload_start))
                return 'cancel';

            // initialize the container element
            _initContainer();

            // bind hotkey function - keyDown - if required
            initHotkeys();

            // search for and bind custom-buttons
            if (o.autoBindCustomButtons) initButtons();

            // bind window.onunload
            $(window).bind("unload." + sID, unload);

            // if layout elements are hidden, then layout WILL NOT complete initialization!
            // initLayoutElements will set initialized=true and run the onload callback IF successful
            if (o.initPanes) _initLayoutElements();

            delete state.creatingLayout;

            return state.initialized;
        }

            /**
             * Initialize the layout IF not already
             *
             * @see  All methods in Instance run this test
             * @return  boolean    true = layoutElements have been initialized | false = panes are not initialized (yet)
             */
                ,    isInitialized = function () {
            if (state.initialized || state.creatingLayout) return true;    // already initialized
            else return _initLayoutElements();	// try to init panes NOW
        }

            /**
             * Initialize the layout - called automatically whenever an instance of layout is created
             *
             * @see  _create() & isInitialized
             * @return  An object pointer to the instance created
             */
                ,    _initLayoutElements = function () {
            // initialize config/options
            var o = options;

            // CANNOT init panes inside a hidden container!
            if (!$N.is(":visible"))
                return false;
            // a center pane is required, so make sure it exists
            if (!getPane('center').length) {
                if (o.showErrorMessages) alert(lang.errCenterPaneMissing);
                return false;
            }

            // TEMP state so isInitialized returns true during init process
            state.creatingLayout = true;

            // update Container dims
            $.extend(sC, elDims($N));

            // initialize all layout elements
            initPanes();	// size & position panes - calls initHandles() - which calls initResizable()
            sizeContent();	// AFTER panes & handles have been initialized, size 'content' divs

            if (o.scrollToBookmarkOnLoad) {
                var l = self.location;
                if (l.hash) l.replace(l.hash); // scrollTo Bookmark
            }

            // bind resizeAll() for 'this layout instance' to window.resize event
            if (o.resizeWithWindow && !$N.data("layoutRole")) // skip if 'nested' inside a pane
                $(window).bind("resize." + sID, windowResize);

            delete state.creatingLayout;
            state.initialized = true;

            _execCallback(null, o.onload_end || o.onload);

            return true; // elements initialized successfully
        }


                ,    windowResize = function () {
            var delay = Number(options.resizeWithWindowDelay);
            if (delay < 10) delay = 100; // MUST have a delay!
            // resizing uses a delay-loop because the resize event fires repeatly - except in FF, but delay anyway
            timer.clear("winResize"); // if already running
            timer.set("winResize", function() {
                timer.clear("winResize");
                timer.clear("winResizeRepeater");
                var dims = elDims($N);
                // only trigger resizeAll() if container has changed size
                if (dims.innerWidth !== sC.innerWidth || dims.innerHeight !== sC.innerHeight)
                    resizeAll();
            }, delay);
            // ALSO set fixed-delay timer, if not already running
            if (!timer.data["winResizeRepeater"]) setWindowResizeRepeater();
        }

                ,    setWindowResizeRepeater = function () {
            var delay = Number(options.resizeWithWindowMaxDelay);
            if (delay > 0)
                timer.set("winResizeRepeater", function() {
                    setWindowResizeRepeater();
                    resizeAll();
                }, delay);
        }

                ,    unload = function () {
            var o = options;
            state.cookie = getState(); // save state in case onunload has custom state-management
            _execCallback(null, o.onunload_start);
            if (o.useStateCookie && o.cookie.autoSave) saveCookie();
            _execCallback(null, o.onunload_end || o.onunload);
        }

            /**
             * Validate and initialize container CSS and events
             *
             * @see  _create()
             */
                ,    _initContainer = function () {
            var
                    tag = sC.tagName = $N[0].tagName
                    ,    o = options
                    ,    fullPage = (tag == "BODY")
                    ,    props = "overflow,position,margin,padding,border"
                    ,    CSS = {}
                    ,    hid = "hidden" // used A LOT!
                    ,    isVis = $N.is(":visible")
                    ;
            // sC -> state.container
            sC.selector = $N.selector.split(".slice")[0];
            sC.ref = tag + "/" + sC.selector; // used in messages

            $N.data("layout", Instance)
                    .data("layoutContainer", sID)// unique identifier for internal use
                    .addClass(o.containerClass)
                    ;

            // SAVE original container CSS for use in destroy()
            if (!$N.data("layoutCSS")) {
                // handle props like overflow different for BODY & HTML - has 'system default' values
                if (fullPage) {
                    CSS = $.extend(elCSS($N, props), {
                        height:        $N.css("height")
                        ,    overflow:    $N.css("overflow")
                        ,    overflowX:    $N.css("overflowX")
                        ,    overflowY:    $N.css("overflowY")
                    });
                    // ALSO SAVE <HTML> CSS
                    var $H = $("html");
                    $H.data("layoutCSS", {
                        height:        "auto" // FF would return a fixed px-size!
                        ,    overflow:    $H.css("overflow")
                        ,    overflowX:    $H.css("overflowX")
                        ,    overflowY:    $H.css("overflowY")
                    });
                }
                else // handle props normally for non-body elements
                    CSS = elCSS($N, props + ",top,bottom,left,right,width,height,overflow,overflowX,overflowY");

                $N.data("layoutCSS", CSS);
            }

            try { // format html/body if this is a full page layout
                if (fullPage) {
                    $("html").css({
                        height:        "100%"
                        ,    overflow:    hid
                        ,    overflowX:    hid
                        ,    overflowY:    hid
                    });
                    $("body").css({
                        position:    "relative"
                        ,    height:        "100%"
                        ,    overflow:    hid
                        ,    overflowX:    hid
                        ,    overflowY:    hid
                        ,    margin:        0
                        ,    padding:    0        // TODO: test whether body-padding could be handled?
                        ,    border:        "none"    // a body-border creates problems because it cannot be measured!
                    });

                    // set current layout-container dimensions
                    $.extend(sC, elDims($N));
                }
                else { // set required CSS for overflow and position
                    // ENSURE container will not 'scroll'
                    CSS = { overflow: hid, overflowX: hid, overflowY: hid }
                    var
                            p = $N.css("position")
                            ,    h = $N.css("height")
                            ;
                    // if this is a NESTED layout, then container/outer-pane ALREADY has position and height
                    if (!$N.data("layoutRole")) {
                        if (!p || !p.match(/fixed|absolute|relative/))
                            CSS.position = "relative"; // container MUST have a 'position'
                        /*
                         if (!h || h=="auto")
                         CSS.height = "100%"; // container MUST have a 'height'
                         */
                    }
                    $N.css(CSS);

                    // set current layout-container dimensions
                    if (isVis) {
                        $.extend(sC, elDims($N));
                        if (o.showErrorMessages && sC.innerHeight < 2)
                            alert(lang.errContainerHeight.replace(/CONTAINER/, sC.ref));
                    }
                }
            } catch (ex) {
            }
        }

            /**
             * Bind layout hotkeys - if options enabled
             *
             * @see  _create() and addPane()
             * @param {string=}    panes        The edge(s) to process, blank = all
             */
                ,    initHotkeys = function (panes) {
            if (!panes || panes == "all") panes = _c.borderPanes;
            // bind keyDown to capture hotkeys, if option enabled for ANY pane
            $.each(panes.split(","), function (i, pane) {
                var o = options[pane];
                if (o.enableCursorHotkey || o.customHotkey) {
                    $(document).bind("keydown." + sID, keyDown); // only need to bind this ONCE
                    return false; // BREAK - binding was done
                }
            });
        }

            /**
             * Build final OPTIONS data
             *
             * @see  _create()
             */
                ,    initOptions = function () {
            // simplify logic by making sure passed 'opts' var has basic keys
            opts = _transformData(opts);

            // TODO: create a compatibility add-on for new UI widget that will transform old option syntax
            var newOpts = {
                applyDefaultStyles:        "applyDemoStyles"
            };
            renameOpts(opts.defaults);
            $.each(_c.allPanes.split(","), function (i, pane) {
                renameOpts(opts[pane]);
            });

            // update default effects, if case user passed key
            if (opts.effects) {
                $.extend(effects, opts.effects);
                delete opts.effects;
            }
            $.extend(options.cookie, opts.cookie);

            // see if any 'global options' were specified
            var globals = "name,containerClass,zIndex,scrollToBookmarkOnLoad,resizeWithWindow,resizeWithWindowDelay,resizeWithWindowMaxDelay," +
                          "onresizeall,onresizeall_start,onresizeall_end,onload,onload_start,onload_end,onunload,onunload_start,onunload_end," +
                          "autoBindCustomButtons,useStateCookie,showErrorMessages";
            $.each(globals.split(","), function (i, key) {
                if (opts[key] !== undefined)
                    options[key] = opts[key];
                else if (opts.defaults[key] !== undefined) {
                    options[key] = opts.defaults[key];
                    delete opts.defaults[key];
                }
            });

            // remove any 'defaults' that MUST be set 'per-pane'
            $.each("paneSelector,resizerCursor,customHotkey".split(","),
                    function (i, key) {
                        delete opts.defaults[key];
                    } // is OK if key does not exist
                    );

            // now update options.defaults
            $.extend(true, options.defaults, opts.defaults);

            // merge config for 'center-pane' - border-panes handled in the loop below
            _c.center = $.extend(true, {}, _c.panes, _c.center);
            // update config.zIndex values if zIndex option specified
            var z = options.zIndex;
            if (z === 0 || z > 0) {
                _c.zIndex.pane_normal = z;
                _c.zIndex.resizer_normal = z + 1;
                _c.zIndex.iframe_mask = z + 1;
            }

            // merge options for 'center-pane' - border-panes handled in the loop below
            $.extend(options.center, opts.center);
            // Most 'default options' do not apply to 'center', so add only those that DO
            var o_Center = $.extend(true, {}, options.defaults, opts.defaults, options.center); // TEMP data
            var optionsCenter = ("paneClass,contentSelector,applyDemoStyles,triggerEventsOnLoad,showOverflowOnHover,"
                    + "onresize,onresize_start,onresize_end,resizeNestedLayout,resizeContentWhileDragging,findNestedContent,"
                    + "onsizecontent,onsizecontent_start,onsizecontent_end").split(",");
            $.each(optionsCenter,
                    function (i, key) {
                        options.center[key] = o_Center[key];
                    }
                    );

            var o, defs = options.defaults;

            // create a COMPLETE set of options for EACH border-pane
            $.each(_c.borderPanes.split(","), function (i, pane) {

                // apply 'pane-defaults' to CONFIG.[PANE]
                _c[pane] = $.extend(true, {}, _c.panes, _c[pane]);

                // apply 'pane-defaults' +  user-options to OPTIONS.PANE
                o = options[pane] = $.extend(true, {}, options.defaults, options[pane], opts.defaults, opts[pane]);

                // make sure we have base-classes
                if (!o.paneClass)        o.paneClass = "ui-layout-pane";
                if (!o.resizerClass)    o.resizerClass = "ui-layout-resizer";
                if (!o.togglerClass)    o.togglerClass = "ui-layout-toggler";

                // create FINAL fx options for each pane, ie: options.PANE.fxName/fxSpeed/fxSettings[_open|_close]
                $.each(["_open","_close",""], function (i, n) {
                    var
                            sName = "fxName" + n
                            ,    sSpeed = "fxSpeed" + n
                            ,    sSettings = "fxSettings" + n
                            ;
                    // recalculate fxName according to specificity rules
                    o[sName] =
                    opts[pane][sName]        // opts.west.fxName_open
                            || opts[pane].fxName        // opts.west.fxName
                            || opts.defaults[sName]    // opts.defaults.fxName_open
                            || opts.defaults.fxName    // opts.defaults.fxName
                            || o[sName]                // options.west.fxName_open
                            || o.fxName                // options.west.fxName
                            || defs[sName]                // options.defaults.fxName_open
                            || defs.fxName                // options.defaults.fxName
                            || "none"
                            ;
                    // validate fxName to be sure is a valid effect
                    var fxName = o[sName];
                    if (fxName == "none" || !$.effects || !$.effects[fxName] || (!effects[fxName] && !o[sSettings] && !o.fxSettings))
                        fxName = o[sName] = "none"; // effect not loaded, OR undefined FX AND fxSettings not passed
                    // set vars for effects subkeys to simplify logic
                    var
                            fx = effects[fxName] || {} // effects.slide
                            ,    fx_all = fx.all || {} // effects.slide.all
                            ,    fx_pane = fx[pane] || {} // effects.slide.west
                            ;
                    // RECREATE the fxSettings[_open|_close] keys using specificity rules
                    o[sSettings] = $.extend(
                    {}
                            , fx_all                        // effects.slide.all
                            , fx_pane                        // effects.slide.west
                            , defs.fxSettings || {}        // options.defaults.fxSettings
                            , defs[sSettings] || {}        // options.defaults.fxSettings_open
                            , o.fxSettings                // options.west.fxSettings
                            , o[sSettings]                // options.west.fxSettings_open
                            , opts.defaults.fxSettings    // opts.defaults.fxSettings
                            , opts.defaults[sSettings] || {} // opts.defaults.fxSettings_open
                            , opts[pane].fxSettings        // opts.west.fxSettings
                            , opts[pane][sSettings] || {}    // opts.west.fxSettings_open
                            );
                    // recalculate fxSpeed according to specificity rules
                    o[sSpeed] =
                    opts[pane][sSpeed]        // opts.west.fxSpeed_open
                            || opts[pane].fxSpeed        // opts.west.fxSpeed (pane-default)
                            || opts.defaults[sSpeed]    // opts.defaults.fxSpeed_open
                            || opts.defaults.fxSpeed    // opts.defaults.fxSpeed
                            || o[sSpeed]                // options.west.fxSpeed_open
                            || o[sSettings].duration    // options.west.fxSettings_open.duration
                            || o.fxSpeed                // options.west.fxSpeed
                            || o.fxSettings.duration    // options.west.fxSettings.duration
                            || defs.fxSpeed            // options.defaults.fxSpeed
                            || defs.fxSettings.duration// options.defaults.fxSettings.duration
                            || fx_pane.duration        // effects.slide.west.duration
                            || fx_all.duration            // effects.slide.all.duration
                            || "normal"                // DEFAULT
                            ;
                });

            });

            function renameOpts(O) {
                for (var key in newOpts) {
                    if (O[key] != undefined) {
                        O[newOpts[key]] = O[key];
                        delete O[key];
                    }
                }
            }
        }

            /**
             * Initialize module objects, styling, size and position for all panes
             *
             * @see  _create()
             * @param {string}    pane        The pane to process
             */
                ,    getPane = function (pane) {
            var sel = options[pane].paneSelector
            if (sel.substr(0, 1) === "#") // ID selector
            // NOTE: elements selected 'by ID' DO NOT have to be 'children'
                return $N.find(sel).eq(0);
            else { // class or other selector
                var $P = $N.children(sel).eq(0);
                // look for the pane nested inside a 'form' element
                return $P.length ? $P : $N.children("form:first").children(sel).eq(0);
            }
        }
                ,    initPanes = function () {
            // NOTE: do north & south FIRST so we can measure their height - do center LAST
            $.each(_c.allPanes.split(","), function (idx, pane) {
                addPane(pane, true);
            });

            // init the pane-handles NOW in case we have to hide or close the pane below
            initHandles();

            // now that all panes have been initialized and initially-sized,
            // make sure there is really enough space available for each pane
            $.each(_c.borderPanes.split(","), function (i, pane) {
                if ($Ps[pane] && state[pane].isVisible) { // pane is OPEN
                    setSizeLimits(pane);
                    makePaneFit(pane); // pane may be Closed, Hidden or Resized by makePaneFit()
                }
            });
            // size center-pane AGAIN in case we 'closed' a border-pane in loop above
            sizeMidPanes("center");

            // Chrome fires callback BEFORE it completes resizing, so add a delay before handling children
            setTimeout(function() {
                $.each(_c.allPanes.split(","), function (i, pane) {
                    var o = options[pane];
                    if ($Ps[pane] && state[pane].isVisible) { // pane is OPEN
                        // trigger onResize callbacks for all panes with triggerEventsOnLoad = true
                        if (o.triggerEventsOnLoad)
                            _execCallback(pane, o.onresize_end || o.onresize);
                        resizeNestedLayout(pane);
                    }
                });
            }, 50); // 50ms delay is enough

            if (options.showErrorMessages && $N.innerHeight() < 2)
                alert(lang.errContainerHeight.replace(/CONTAINER/, sC.ref));
        }

            /**
             * Remove a pane from the layout - subroutine of destroy()
             *
             * @see  initPanes()
             * @param {string}    pane        The pane to process
             */
                ,    addPane = function (pane, force) {
            if (!force && !isInitialized()) return;
            var
                    o = options[pane]
                    ,    s = state[pane]
                    ,    c = _c[pane]
                    ,    fx = s.fx
                    ,    dir = c.dir
                    ,    spacing = o.spacing_open || 0
                    ,    isCenter = (pane == "center")
                    ,    CSS = {}
                    ,    $P = $Ps[pane]
                    ,    size, minSize, maxSize
                    ;

            // if pane-pointer already exists, remove the old one first
            if ($P)
                removePane(pane);
            else
                $Cs[pane] = false; // init

            $P = $Ps[pane] = getPane(pane);
            if (!$P.length) {
                $Ps[pane] = false; // logic
                return;
            }

            // SAVE original Pane CSS
            if (!$P.data("layoutCSS")) {
                var props = "position,top,left,bottom,right,width,height,overflow,zIndex,display,backgroundColor,padding,margin,border";
                $P.data("layoutCSS", elCSS($P, props));
            }

            // add basic classes & attributes
            $P
                    .data("parentLayout", Instance)
                    .data("layoutRole", "pane")
                    .data("layoutEdge", pane)
                    .css(c.cssReq).css("zIndex", _c.zIndex.pane_normal)
                    .css(o.applyDemoStyles ? c.cssDemo : {})// demo styles
                    .addClass(o.paneClass + " " + o.paneClass + "-" + pane)// default = "ui-layout-pane ui-layout-pane-west" - may be a dupe of 'paneSelector'
                    .bind("mouseenter." + sID, addHover)
                    .bind("mouseleave." + sID, removeHover)
                    ;

            // see if this pane has a 'scrolling-content element'
            initContent(pane, false); // false = do NOT sizeContent() - called later

            if (!isCenter) {
                // call _parseSize AFTER applying pane classes & styles - but before making visible (if hidden)
                // if o.size is auto or not valid, then MEASURE the pane and use that as its 'size'
                size = s.size = _parseSize(pane, o.size);
                minSize = _parseSize(pane, o.minSize) || 1;
                maxSize = _parseSize(pane, o.maxSize) || 100000;
                if (size > 0) size = max(min(size, maxSize), minSize);

                // state for border-panes
                s.isClosed = false; // true = pane is closed
                s.isSliding = false; // true = pane is currently open by 'sliding' over adjacent panes
                s.isResizing = false; // true = pane is in process of being resized
                s.isHidden = false; // true = pane is hidden - no spacing, resizer or toggler is visible!
            }
            //	state common to ALL panes
            s.tagName = $P[0].tagName;
            s.edge = pane   // useful if pane is (or about to be) 'swapped' - easy find out where it is (or is going)
            s.noRoom = false; // true = pane 'automatically' hidden due to insufficient room - will unhide automatically
            s.isVisible = true;  // false = pane is invisible - closed OR hidden - simplify logic

            // set css-position to account for container borders & padding
            switch (pane) {
                case "north":     CSS.top = sC.insetTop;
                    CSS.left = sC.insetLeft;
                    CSS.right = sC.insetRight;
                    break;
                case "south":     CSS.bottom = sC.insetBottom;
                    CSS.left = sC.insetLeft;
                    CSS.right = sC.insetRight;
                    break;
                case "west":     CSS.left = sC.insetLeft; // top, bottom & height set by sizeMidPanes()
                    break;
                case "east":     CSS.right = sC.insetRight; // ditto
                    break;
                case "center":    // top, left, width & height set by sizeMidPanes()
            }

            if (dir == "horz") // north or south pane
                CSS.height = max(1, cssH(pane, size));
            else if (dir == "vert") // east or west pane
                CSS.width = max(1, cssW(pane, size));
            //else if (isCenter) {}

            $P.css(CSS); // apply size -- top, bottom & height will be set by sizeMidPanes
            if (dir != "horz") sizeMidPanes(pane, true); // true = skipCallback

            // close or hide the pane if specified in settings
            if (o.initClosed && o.closable && !o.initHidden)
                close(pane, true, true); // true, true = force, noAnimation
            else if (o.initHidden || o.initClosed)
                hide(pane); // will be completely invisible - no resizer or spacing
            else if (!s.noRoom)
                // make the pane visible - in case was initially hidden
                    $P.css("display", "block");
            // ELSE setAsOpen() - called later by initHandles()

            // RESET visibility now - pane will appear IF display:block
            $P.css("visibility", "visible");

            // check option for auto-handling of pop-ups & drop-downs
            if (o.showOverflowOnHover)
                $P.hover(allowOverflow, resetOverflow);

            // if adding a pane AFTER initialization, then...
            if (state.initialized) {
                initHandles(pane);
                initHotkeys(pane);
                resizeAll(); // will sizeContent if pane is visible
                if (s.isVisible) { // pane is OPEN
                    if (o.triggerEventsOnLoad)
                        _execCallback(pane, o.onresize_end || o.onresize);
                    resizeNestedLayout(pane);
                }
            }
        }

            /**
             * Initialize module objects, styling, size and position for all resize bars and toggler buttons
             *
             * @see  _create()
             * @param {string=}    panes        The edge(s) to process, blank = all
             */
                ,    initHandles = function (panes) {
            if (!panes || panes == "all") panes = _c.borderPanes;

            // create toggler DIVs for each pane, and set object pointers for them, eg: $R.north = north toggler DIV
            $.each(panes.split(","), function (i, pane) {
                var $P = $Ps[pane];
                $Rs[pane] = false; // INIT
                $Ts[pane] = false;
                if (!$P) return; // pane does not exist - skip

                var
                        o = options[pane]
                        ,    s = state[pane]
                        ,    c = _c[pane]
                        ,    rClass = o.resizerClass
                        ,    tClass = o.togglerClass
                        ,    side = c.side.toLowerCase()
                        ,    spacing = (s.isVisible ? o.spacing_open : o.spacing_closed)
                        ,    _pane = "-" + pane // used for classNames
                        ,    _state = (s.isVisible ? "-open" : "-closed") // used for classNames
                    // INIT RESIZER BAR
                        ,    $R = $Rs[pane] = $("<div></div>")
                    // INIT TOGGLER BUTTON
                        ,    $T = (o.closable ? $Ts[pane] = $("<div></div>") : false)
                        ;

                //if (s.isVisible && o.resizable) ... handled by initResizable
                if (!s.isVisible && o.slidable)
                    $R.attr("title", o.sliderTip).css("cursor", o.sliderCursor);

                $R
                    // if paneSelector is an ID, then create a matching ID for the resizer, eg: "#paneLeft" => "paneLeft-resizer"
                        .attr("id", (o.paneSelector.substr(0, 1) == "#" ? o.paneSelector.substr(1) + "-resizer" : ""))
                        .data("parentLayout", Instance)
                        .data("layoutRole", "resizer")
                        .data("layoutEdge", pane)
                        .css(_c.resizers.cssReq).css("zIndex", _c.zIndex.resizer_normal)
                        .css(o.applyDemoStyles ? _c.resizers.cssDemo : {})// add demo styles
                        .addClass(rClass + " " + rClass + _pane)
                        .appendTo($N) // append DIV to container
                        ;

                if ($T) {
                    $T
                        // if paneSelector is an ID, then create a matching ID for the resizer, eg: "#paneLeft" => "#paneLeft-toggler"
                            .attr("id", (o.paneSelector.substr(0, 1) == "#" ? o.paneSelector.substr(1) + "-toggler" : ""))
                            .data("parentLayout", Instance)
                            .data("layoutRole", "toggler")
                            .data("layoutEdge", pane)
                            .css(_c.togglers.cssReq)// add base/required styles
                            .css(o.applyDemoStyles ? _c.togglers.cssDemo : {})// add demo styles
                            .addClass(tClass + " " + tClass + _pane)
                            .appendTo($R) // append SPAN to resizer DIV
                            ;
                    // ADD INNER-SPANS TO TOGGLER
                    if (o.togglerContent_open) // ui-layout-open
                        $("<span>" + o.togglerContent_open + "</span>")
                                .data("layoutRole", "togglerContent")
                                .data("layoutEdge", pane)
                                .addClass("content content-open")
                                .css("display", "none")
                                .appendTo($T)
                            //.hover( addHover, removeHover ) // use ui-layout-toggler-west-hover .content-open instead!
                                ;
                    if (o.togglerContent_closed) // ui-layout-closed
                        $("<span>" + o.togglerContent_closed + "</span>")
                                .data("layoutRole", "togglerContent")
                                .data("layoutEdge", pane)
                                .addClass("content content-closed")
                                .css("display", "none")
                                .appendTo($T)
                            //.hover( addHover, removeHover ) // use ui-layout-toggler-west-hover .content-closed instead!
                                ;
                    // ADD TOGGLER.click/.hover
                    enableClosable(pane);
                }

                // add Draggable events
                initResizable(pane);

                // ADD CLASSNAMES & SLIDE-BINDINGS - eg: class="resizer resizer-west resizer-open"
                if (s.isVisible)
                    setAsOpen(pane);    // onOpen will be called, but NOT onResize
                else {
                    setAsClosed(pane);	// onClose will be called
                    bindStartSlidingEvent(pane, true); // will enable events IF option is set
                }

            });

            // SET ALL HANDLE DIMENSIONS
            sizeHandles("all");
        }


            /**
             * Initialize scrolling ui-layout-content div - if exists
             *
             * @see  initPane() - or externally after an Ajax injection
             * @param {string}    pane        The pane to process
             * @param {boolean=}    resize        Size content after init, default = true
             */
                ,    initContent = function (pane, resize) {
            if (!isInitialized()) return;
            var
                    o = options[pane]
                    ,    sel = o.contentSelector
                    ,    $P = $Ps[pane]
                    ,    $C
                    ;
            if (sel) $C = $Cs[pane] = (o.findNestedContent)
                    ? $P.find(sel).eq(0) // match 1-element only
                    : $P.children(sel).eq(0)
                    ;
            if ($C && $C.length) {
                // SAVE original Pane CSS
                if (!$C.data("layoutCSS"))
                    $C.data("layoutCSS", elCSS($C, "height"));
                $C.css(_c.content.cssReq);
                if (o.applyDemoStyles) {
                    $C.css(_c.content.cssDemo); // add padding & overflow: auto to content-div
                    $P.css(_c.content.cssDemoPane); // REMOVE padding/scrolling from pane
                }
                state[pane].content = {}; // init content state
                if (resize !== false) sizeContent(pane);
                // sizeContent() is called AFTER init of all elements
            }
            else
                $Cs[pane] = false;
        }


            /**
             * Searches for .ui-layout-button-xxx elements and auto-binds them as layout-buttons
             *
             * @see  _create()
             */
                ,    initButtons = function () {
            var pre = "ui-layout-button-", name;
            $.each("toggle,open,close,pin,toggle-slide,open-slide".split(","), function (i, action) {
                $.each(_c.borderPanes.split(","), function (ii, pane) {
                    $("." + pre + action + "-" + pane).each(function() {
                        // if button was previously 'bound', data.layoutName was set, but is blank if layout has no 'name'
                        name = $(this).data("layoutName") || $(this).attr("layoutName");
                        if (name == undefined || name == options.name)
                            bindButton(this, action, pane);
                    });
                });
            });
        }

            /**
             * Add resize-bars to all panes that specify it in options
             * -dependancy: $.fn.resizable - will skip if not found
             *
             * @see            _create()
             * @param {string=}    panes        The edge(s) to process, blank = all
             */
                ,    initResizable = function (panes) {
            var
                    draggingAvailable = (typeof $.fn.draggable == "function")
                    ,    $Frames, side // set in start()
                    ;
            if (!panes || panes == "all") panes = _c.borderPanes;

            $.each(panes.split(","), function (idx, pane) {
                var
                        o = options[pane]
                        ,    s = state[pane]
                        ,    c = _c[pane]
                        ,    side = (c.dir == "horz" ? "top" : "left")
                        ,    r, live // set in start because may change
                        ;
                if (!draggingAvailable || !$Ps[pane] || !o.resizable) {
                    o.resizable = false;
                    return true; // skip to next
                }

                var
                        $P = $Ps[pane]
                        ,    $R = $Rs[pane]
                        ,    base = o.resizerClass
                    //	'drag' classes are applied to the ORIGINAL resizer-bar while dragging is in process
                        ,    resizerClass = base + "-drag"                // resizer-drag
                        ,    resizerPaneClass = base + "-" + pane + "-drag"        // resizer-north-drag
                    //	'helper' class is applied to the CLONED resizer-bar while it is being dragged
                        ,    helperClass = base + "-dragging"            // resizer-dragging
                        ,    helperPaneClass = base + "-" + pane + "-dragging" // resizer-north-dragging
                        ,    helperLimitClass = base + "-dragging-limit"    // resizer-drag
                        ,    helperPaneLimitClass = base + "-" + pane + "-dragging-limit"    // resizer-north-drag
                        ,    helperClassesSet = false                     // logic var
                        ;

                if (!s.isClosed)
                    $R
                            .attr("title", o.resizerTip)
                            .css("cursor", o.resizerCursor) // n-resize, s-resize, etc
                            ;

                $R.bind("mouseenter." + sID, onResizerEnter)
                        .bind("mouseleave." + sID, onResizerLeave);

                $R.draggable({
                    containment:    $N[0] // limit resizing to layout container
                    ,    axis:            (c.dir == "horz" ? "y" : "x") // limit resizing to horz or vert axis
                    ,    delay:            0
                    ,    distance:        1
                    //	basic format for helper - style it using class: .ui-draggable-dragging
                    ,    helper:            "clone"
                    ,    opacity:        o.resizerDragOpacity
                    ,    addClasses:        false // avoid ui-state-disabled class when disabled
                    //,	iframeFix:		o.draggableIframeFix // TODO: consider using when bug is fixed
                    ,    zIndex:            _c.zIndex.resizer_drag

                    ,    start: function (e, ui) {
                        // REFRESH options & state pointers in case we used swapPanes
                        o = options[pane];
                        s = state[pane];
                        // re-read options
                        live = o.resizeWhileDragging;

                        // ondrag_start callback - will CANCEL hide if returns false
                        // TODO: dragging CANNOT be cancelled like this, so see if there is a way?
                        if (false === _execCallback(pane, o.ondrag_start)) return false;

                        _c.isLayoutBusy = true; // used by sizePane() logic during a liveResize
                        s.isResizing = true; // prevent pane from closing while resizing
                        timer.clear(pane + "_closeSlider"); // just in case already triggered

                        // SET RESIZER LIMITS - used in drag()
                        setSizeLimits(pane); // update pane/resizer state
                        r = s.resizerPosition;

                        $R.addClass(resizerClass + " " + resizerPaneClass); // add drag classes
                        helperClassesSet = false; // reset logic var - see drag()

                        // MASK PANES WITH IFRAMES OR OTHER TROUBLESOME ELEMENTS
                        $Frames = $(o.maskIframesOnResize === true ? "iframe" : o.maskIframesOnResize).filter(":visible");
                        var id, i = 0; // ID incrementer - used when 'resizing' masks during dynamic resizing
                        $Frames.each(function() {
                            id = "ui-layout-mask-" + (++i);
                            $(this).data("layoutMaskID", id); // tag iframe with corresponding maskID
                            $('<div id="' + id + '" class="ui-layout-mask ui-layout-mask-' + pane + '"/>')
                                    .css({
                                background:    "#fff"
                                ,    opacity:    "0.001"
                                ,    zIndex:        _c.zIndex.iframe_mask
                                ,    position:    "absolute"
                                ,    width:        this.offsetWidth + "px"
                                ,    height:        this.offsetHeight + "px"
                            })
                                    .css($(this).position())// top & left -- changed from offset()
                                    .appendTo(this.parentNode) // put mask-div INSIDE pane to avoid zIndex issues
                                    ;
                        });

                        // DISABLE TEXT SELECTION (probably already done by resizer.mouseOver)
                        $('body').disableSelection();
                    }

                    ,    drag: function (e, ui) {
                        if (!helperClassesSet) { // can only add classes after clone has been added to the DOM
                            //$(".ui-draggable-dragging")
                            ui.helper
                                    .addClass(helperClass + " " + helperPaneClass)// add helper classes
                                    .css({ right: "auto", bottom: "auto" })// fix dir="rtl" issue
                                    .children().css("visibility", "hidden")    // hide toggler inside dragged resizer-bar
                                    ;
                            helperClassesSet = true;
                            // draggable bug!? RE-SET zIndex to prevent E/W resize-bar showing through N/S pane!
                            if (s.isSliding) $Ps[pane].css("zIndex", _c.zIndex.pane_sliding);
                        }
                        // CONTAIN RESIZER-BAR TO RESIZING LIMITS
                        var limit = 0;
                        if (ui.position[side] < r.min) {
                            ui.position[side] = r.min;
                            limit = -1;
                        }
                        else if (ui.position[side] > r.max) {
                            ui.position[side] = r.max;
                            limit = 1;
                        }
                        // ADD/REMOVE dragging-limit CLASS
                        if (limit) {
                            ui.helper.addClass(helperLimitClass + " " + helperPaneLimitClass); // at dragging-limit
                            window.defaultStatus = "Panel has reached its " +
                                                   ((limit > 0 && pane.match(/north|west/)) || (limit < 0 && pane.match(/south|east/)) ? "maximum" : "minimum") + " size";
                        }
                        else {
                            ui.helper.removeClass(helperLimitClass + " " + helperPaneLimitClass); // not at dragging-limit
                            window.defaultStatus = "";
                        }
                        // DYNAMICALLY RESIZE PANES IF OPTION ENABLED
                        if (live) resizePanes(e, ui, pane);
                    }

                    ,    stop: function (e, ui) {
                        $('body').enableSelection(); // RE-ENABLE TEXT SELECTION
                        window.defaultStatus = ""; // clear 'resizing limit' message from statusbar
                        $R.removeClass(resizerClass + " " + resizerPaneClass); // remove drag classes from Resizer
                        s.isResizing = false;
                        _c.isLayoutBusy = false; // set BEFORE resizePanes so other logic can pick it up
                        resizePanes(e, ui, pane, true); // true = resizingDone
                    }

                });

                /**
                 * resizePanes
                 *
                 * Sub-routine called from stop() and optionally drag()
                 *
                 * @param {!Object}        evt
                 * @param {!Object}        ui
                 * @param {string}        pane
                 * @param {boolean=}        resizingDone
                 */
                var resizePanes = function (evt, ui, pane, resizingDone) {
                    var
                            dragPos = ui.position
                            ,    c = _c[pane]
                            ,    resizerPos, newSize
                            ,    i = 0 // ID incrementer
                            ;
                    switch (pane) {
                        case "north":    resizerPos = dragPos.top; break;
                        case "west":    resizerPos = dragPos.left; break;
                        case "south":    resizerPos = sC.offsetHeight - dragPos.top - o.spacing_open; break;
                        case "east":    resizerPos = sC.offsetWidth - dragPos.left - o.spacing_open; break;
                    }
                    ;

                    if (resizingDone) {
                        // Remove OR Resize MASK(S) created in drag.start
                        $("div.ui-layout-mask").each(function() {
                            this.parentNode.removeChild(this);
                        });
                        //$("div.ui-layout-mask").remove(); // TODO: Is this less efficient?

                        // ondrag_start callback - will CANCEL hide if returns false
                        if (false === _execCallback(pane, o.ondrag_end || o.ondrag)) return false;
                    }
                    else
                        $Frames.each(function() {
                            $("#" + $(this).data("layoutMaskID"))// get corresponding mask by ID
                                    .css($(this).position())// update top & left
                                    .css({ // update width & height
                                width:    this.offsetWidth + "px"
                                ,    height:    this.offsetHeight + "px"
                            })
                                    ;
                        });

                    // remove container margin from resizer position to get the pane size
                    newSize = resizerPos - sC["inset" + c.side];
                    manualSizePane(pane, newSize);
                }
            });
        }


            /**
             *    Destroy this layout and reset all elements
             */
                ,    destroy = function () {
            // UNBIND layout events and remove global object
            $(window).unbind("." + sID);
            $(document).unbind("." + sID);

            // loop all panes to remove layout classes, attributes and bindings
            $.each(_c.allPanes.split(","), function (i, pane) {
                removePane(pane, false, true); // true = skipResize
            });

            // reset layout-container
            $N.removeData("layout")
                    .removeData("layoutContainer")
                    .removeClass(options.containerClass)
                    ;

            // do NOT reset container CSS if is a 'pane' in an outer-layout - ie, THIS layout is 'nested'
            if (!$N.data("layoutEdge") && $N.data("layoutCSS")) // RESET CSS
                $N.css($N.data("layoutCSS")).removeData("layoutCSS");

            // for full-page layouts, also reset the <HTML> CSS
            if (sC.tagName == "BODY" && ($N = $("html")).data("layoutCSS")) // RESET <HTML> CSS
                $N.css($N.data("layoutCSS")).removeData("layoutCSS");

            // trigger state-management and onunload callback
            unload();
        }

            /**
             * Remove a pane from the layout - subroutine of destroy()
             *
             * @see  destroy()
             * @param {string}    pane        The pane to process
             * @param {boolean=}    remove        Remove the DOM element?        default = false
             * @param {boolean=}    skipResize    Skip calling resizeAll()?    default = false
             */
                ,    removePane = function (pane, remove, skipResize) {
            if (!isInitialized()) return;
            if (!$Ps[pane]) return; // NO SUCH PANE
            var
                    $P = $Ps[pane]
                    ,    $C = $Cs[pane]
                    ,    $R = $Rs[pane]
                    ,    $T = $Ts[pane]
                //	create list of ALL pane-classes that need to be removed
                    ,    _open = "-open"
                    ,    _sliding = "-sliding"
                    ,    _closed = "-closed"
                    ,    root = options[pane].paneClass // default="ui-layout-pane"
                    ,    pRoot = root + "-" + pane // eg: "ui-layout-pane-west"
                    ,    classes = [    root, root + _open, root + _closed, root + _sliding,        // generic classes
                pRoot, pRoot + _open, pRoot + _closed, pRoot + _sliding ]    // pane-specific classes
                    ;
            $.merge(classes, getHoverClasses($P, true)); // ADD hover-classes

            if (!$P || !$P.length) {
            } // pane has already been deleted!
            else if (remove && !$P.data("layoutContainer") && (!$C || !$C.length || !$C.data("layoutContainer")))
                $P.remove();
            else {
                $P.removeClass(classes.join(" "))// remove ALL pane-classes
                        .removeData("layoutParent")
                        .removeData("layoutRole")
                        .removeData("layoutEdge")
                        .removeData("autoHidden")// in case set
                        .unbind("." + sID) // remove ALL Layout events
                    // TODO: remove these extra unbind commands when jQuery is fixed
                    //.unbind("mouseenter"+ sID)
                    //.unbind("mouseleave"+ sID)
                        ;
                // do NOT reset CSS if this pane is STILL the container of a nested layout!
                // the nested layout will reset its 'container' when/if it is destroyed
                if (!$P.data("layoutContainer"))
                    $P.css($P.data("layoutCSS")).removeData("layoutCSS");
                // DITTO for the Content elem
                if ($C && $C.length && !$C.data("layoutContainer"))
                    $C.css($C.data("layoutCSS")).removeData("layoutCSS");
            }

            // REMOVE pane resizer and toggler elements
            if ($T && $T.length) $T.remove();
            if ($R && $R.length) $R.remove();

            // CLEAR all pointers and data
            $Ps[pane] = $Cs[pane] = $Rs[pane] = $Ts[pane] = false;

            // skip resize & state-clear when called from destroy()
            if (!skipResize) {
                resizeAll();
                state[pane] = {};
            }
        }


            /*
             * ###########################
             *	   ACTION METHODS
             * ###########################
             */

            /**
             * Completely 'hides' a pane, including its spacing - as if it does not exist
             * The pane is not actually 'removed' from the source, so can use 'show' to un-hide it
             *
             * @param {string}    pane        The pane being hidden, ie: north, south, east, or west
             * @param {boolean=}    noAnimation
             */
                ,    hide = function (pane, noAnimation) {
            if (!isInitialized()) return;
            var
                    o = options[pane]
                    ,    s = state[pane]
                    ,    $P = $Ps[pane]
                    ,    $R = $Rs[pane]
                    ;
            if (!$P || s.isHidden) return; // pane does not exist OR is already hidden

            // onhide_start callback - will CANCEL hide if returns false
            if (state.initialized && false === _execCallback(pane, o.onhide_start)) return;

            s.isSliding = false; // just in case

            // now hide the elements
            if ($R) $R.hide(); // hide resizer-bar
            if (!state.initialized || s.isClosed) {
                s.isClosed = true; // to trigger open-animation on show()
                s.isHidden = true;
                s.isVisible = false;
                $P.hide(); // no animation when loading page
                sizeMidPanes(_c[pane].dir == "horz" ? "all" : "center");
                if (state.initialized || o.triggerEventsOnLoad)
                    _execCallback(pane, o.onhide_end || o.onhide);
            }
            else {
                s.isHiding = true; // used by onclose
                close(pane, false, noAnimation); // adjust all panes to fit
            }
        }

            /**
             * Show a hidden pane - show as 'closed' by default unless openPane = true
             *
             * @param {string}    pane        The pane being opened, ie: north, south, east, or west
             * @param {boolean=}    openPane
             * @param {boolean=}    noAnimation
             * @param {boolean=}    noAlert
             */
                ,    show = function (pane, openPane, noAnimation, noAlert) {
            if (!isInitialized()) return;
            var
                    o = options[pane]
                    ,    s = state[pane]
                    ,    $P = $Ps[pane]
                    ,    $R = $Rs[pane]
                    ;
            if (!$P || !s.isHidden) return; // pane does not exist OR is not hidden

            // onshow_start callback - will CANCEL show if returns false
            if (false === _execCallback(pane, o.onshow_start)) return;

            s.isSliding = false; // just in case
            s.isShowing = true; // used by onopen/onclose
            //s.isHidden  = false; - will be set by open/close - if not cancelled

            // now show the elements
            //if ($R) $R.show(); - will be shown by open/close
            if (openPane === false)
                close(pane, true); // true = force
            else
                open(pane, false, noAnimation, noAlert); // adjust all panes to fit
        }


            /**
             * Toggles a pane open/closed by calling either open or close
             *
             * @param {string}    pane   The pane being toggled, ie: north, south, east, or west
             * @param {boolean=}    slide
             */
                ,    toggle = function (pane, slide) {
            if (!isInitialized()) return;
            if (!isStr(pane)) {
                pane.stopImmediatePropagation(); // pane = event
                pane = $(this).data("layoutEdge"); // bound to $R.dblclick
            }
            var s = state[str(pane)];
            if (s.isHidden)
                show(pane); // will call 'open' after unhiding it
            else if (s.isClosed)
                open(pane, !!slide);
            else
                close(pane);
        }


            /**
             * Utility method used during init or other auto-processes
             *
             * @param {string}    pane   The pane being closed
             * @param {boolean=}    setHandles
             */
                ,    _closePane = function (pane, setHandles) {
            var
                    $P = $Ps[pane]
                    ,    s = state[pane]
                    ;
            $P.hide();
            s.isClosed = true;
            s.isVisible = false;
            // UNUSED: if (setHandles) setAsClosed(pane, true); // true = force
        }

            /**
             * Close the specified pane (animation optional), and resize all other panes as needed
             *
             * @param {string}    pane        The pane being closed, ie: north, south, east, or west
             * @param {boolean=}    force
             * @param {boolean=}    noAnimation
             * @param {boolean=}    skipCallback
             */
                ,    close = function (pane, force, noAnimation, skipCallback) {
            if (!state.initialized && $Ps[pane]) {
                _closePane(pane); // INIT pane as closed
                return;
            }
            if (!isInitialized()) return;
            var
                    $P = $Ps[pane]
                    ,    $R = $Rs[pane]
                    ,    $T = $Ts[pane]
                    ,    o = options[pane]
                    ,    s = state[pane]
                    ,    doFX = !noAnimation && !s.isClosed && (o.fxName_close != "none")
                // 	transfer logic vars to temp vars
                    ,    isShowing = s.isShowing
                    ,    isHiding = s.isHiding
                    ,    wasSliding = s.isSliding
                    ;
            // now clear the logic vars
            delete s.isShowing;
            delete s.isHiding;

            if (!$P || (!o.closable && !isShowing && !isHiding)) return; // invalid request // (!o.resizable && !o.closable) ???
            else if (!force && s.isClosed && !isShowing) return; // already closed

            if (_c.isLayoutBusy) { // layout is 'busy' - probably with an animation
                _queue("close", pane, force); // set a callback for this action, if possible
                return; // ABORT
            }

            // onclose_start callback - will CANCEL hide if returns false
            // SKIP if just 'showing' a hidden pane as 'closed'
            if (!isShowing && false === _execCallback(pane, o.onclose_start)) return;

            // SET flow-control flags
            _c[pane].isMoving = true;
            _c.isLayoutBusy = true;

            s.isClosed = true;
            s.isVisible = false;
            // update isHidden BEFORE sizing panes
            if (isHiding) s.isHidden = true;
            else if (isShowing) s.isHidden = false;

            if (s.isSliding) // pane is being closed, so UNBIND trigger events
                bindStopSlidingEvents(pane, false); // will set isSliding=false
            else // resize panes adjacent to this one
                sizeMidPanes(_c[pane].dir == "horz" ? "all" : "center", false); // false = NOT skipCallback

            // if this pane has a resizer bar, move it NOW - before animation
            setAsClosed(pane);

            // CLOSE THE PANE
            if (doFX) { // animate the close
                lockPaneForFX(pane, true); // need to set left/top so animation will work
                $P.hide(o.fxName_close, o.fxSettings_close, o.fxSpeed_close, function () {
                    lockPaneForFX(pane, false); // undo
                    close_2();
                });
            }
            else { // hide the pane without animation
                $P.hide();
                close_2();
            }
            ;

            // SUBROUTINE
            function close_2() {
                if (s.isClosed) { // make sure pane was not 'reopened' before animation finished!

                    bindStartSlidingEvent(pane, true); // will enable if o.slidable = true

                    // if opposite-pane was autoClosed, see if it can be autoOpened now
                    var altPane = _c.altSide[pane];
                    if (state[ altPane ].noRoom) {
                        setSizeLimits(altPane);
                        makePaneFit(altPane);
                    }

                    if (!skipCallback && (state.initialized || o.triggerEventsOnLoad)) {
                        // onclose callback - UNLESS just 'showing' a hidden pane as 'closed'
                        if (!isShowing) _execCallback(pane, o.onclose_end || o.onclose);
                        // onhide OR onshow callback
                        if (isShowing)    _execCallback(pane, o.onshow_end || o.onshow);
                        if (isHiding)    _execCallback(pane, o.onhide_end || o.onhide);
                    }
                }
                // execute internal flow-control callback
                _dequeue(pane);
            }
        }

            /**
             * @param {string}    pane    The pane just closed, ie: north, south, east, or west
             */
                ,    setAsClosed = function (pane) {
            var
                    $P = $Ps[pane]
                    ,    $R = $Rs[pane]
                    ,    $T = $Ts[pane]
                    ,    o = options[pane]
                    ,    s = state[pane]
                    ,    side = _c[pane].side.toLowerCase()
                    ,    inset = "inset" + _c[pane].side
                    ,    rClass = o.resizerClass
                    ,    tClass = o.togglerClass
                    ,    _pane = "-" + pane // used for classNames
                    ,    _open = "-open"
                    ,    _sliding = "-sliding"
                    ,    _closed = "-closed"
                    ;
            $R
                    .css(side, sC[inset])// move the resizer
                    .removeClass(rClass + _open + " " + rClass + _pane + _open)
                    .removeClass(rClass + _sliding + " " + rClass + _pane + _sliding)
                    .addClass(rClass + _closed + " " + rClass + _pane + _closed)
                    .unbind("dblclick." + sID)
                    ;
            // DISABLE 'resizing' when closed - do this BEFORE bindStartSlidingEvent?
            if (o.resizable && typeof $.fn.draggable == "function")
                $R
                        .draggable("disable")
                        .removeClass("ui-state-disabled")// do NOT apply disabled styling - not suitable here
                        .css("cursor", "default")
                        .attr("title", "")
                        ;

            // if pane has a toggler button, adjust that too
            if ($T) {
                $T
                        .removeClass(tClass + _open + " " + tClass + _pane + _open)
                        .addClass(tClass + _closed + " " + tClass + _pane + _closed)
                        .attr("title", o.togglerTip_closed) // may be blank
                        ;
                // toggler-content - if exists
                $T.children(".content-open").hide();
                $T.children(".content-closed").css("display", "block");
            }

            // sync any 'pin buttons'
            syncPinBtns(pane, false);

            if (state.initialized) {
                // resize 'length' and position togglers for adjacent panes
                sizeHandles("all");
            }
        }

            /**
             * Open the specified pane (animation optional), and resize all other panes as needed
             *
             * @param {string}    pane        The pane being opened, ie: north, south, east, or west
             * @param {boolean=}    slide
             * @param {boolean=}    noAnimation
             * @param {boolean=}    noAlert
             */
                ,    open = function (pane, slide, noAnimation, noAlert) {
            if (!isInitialized()) return;
            var
                    $P = $Ps[pane]
                    ,    $R = $Rs[pane]
                    ,    $T = $Ts[pane]
                    ,    o = options[pane]
                    ,    s = state[pane]
                    ,    doFX = !noAnimation && s.isClosed && (o.fxName_open != "none")
                // 	transfer logic var to temp var
                    ,    isShowing = s.isShowing
                    ;
            // now clear the logic var
            delete s.isShowing;

            if (!$P || (!o.resizable && !o.closable && !isShowing)) return; // invalid request
            else if (s.isVisible && !s.isSliding) return; // already open

            // pane can ALSO be unhidden by just calling show(), so handle this scenario
            if (s.isHidden && !isShowing) {
                show(pane, true);
                return;
            }

            if (_c.isLayoutBusy) { // layout is 'busy' - probably with an animation
                _queue("open", pane, slide); // set a callback for this action, if possible
                return; // ABORT
            }

            setSizeLimits(pane, slide); // update pane-state

            // onopen_start callback - will CANCEL hide if returns false
            if (false === _execCallback(pane, o.onopen_start)) return;

            // make sure there is enough space available to open the pane
            setSizeLimits(pane, slide); // update pane-state
            if (s.minSize > s.maxSize) { // INSUFFICIENT ROOM FOR PANE TO OPEN!
                syncPinBtns(pane, false); // make sure pin-buttons are reset
                if (!noAlert && o.noRoomToOpenTip)
                    alert(o.noRoomToOpenTip);
                return; // ABORT
            }

            // SET flow-control flags
            _c[pane].isMoving = true;
            _c.isLayoutBusy = true;

            if (slide) // START Sliding - will set isSliding=true
                bindStopSlidingEvents(pane, true); // BIND trigger events to close sliding-pane
            else if (s.isSliding) // PIN PANE (stop sliding) - open pane 'normally' instead
                bindStopSlidingEvents(pane, false); // UNBIND trigger events - will set isSliding=false
            else if (o.slidable)
                    bindStartSlidingEvent(pane, false); // UNBIND trigger events

            s.noRoom = false; // will be reset by makePaneFit if 'noRoom'
            makePaneFit(pane);

            s.isVisible = true;
            s.isClosed = false;
            // update isHidden BEFORE sizing panes - WHY??? Old?
            if (isShowing) s.isHidden = false;

            if (doFX) { // ANIMATE
                lockPaneForFX(pane, true); // need to set left/top so animation will work
                $P.show(o.fxName_open, o.fxSettings_open, o.fxSpeed_open, function() {
                    lockPaneForFX(pane, false); // undo
                    open_2(); // continue
                });
            }
            else {// no animation
                $P.show();	// just show pane and...
                open_2();	// continue
            }
            ;

            // SUBROUTINE
            function open_2() {
                if (s.isVisible) { // make sure pane was not closed or hidden before animation finished!

                    // cure iframe display issues
                    _fixIframe(pane);

                    // NOTE: if isSliding, then other panes are NOT 'resized'
                    if (!s.isSliding) // resize all panes adjacent to this one
                        sizeMidPanes(_c[pane].dir == "vert" ? "center" : "all", false); // false = NOT skipCallback

                    // set classes, position handles and execute callbacks...
                    setAsOpen(pane);
                }

                // internal flow-control callback
                _dequeue(pane);
            }

            ;

        }

            /**
             * @param {string}    pane        The pane just opened, ie: north, south, east, or west
             * @param {boolean=}    skipCallback
             */
                ,    setAsOpen = function (pane, skipCallback) {
            var
                    $P = $Ps[pane]
                    ,    $R = $Rs[pane]
                    ,    $T = $Ts[pane]
                    ,    o = options[pane]
                    ,    s = state[pane]
                    ,    side = _c[pane].side.toLowerCase()
                    ,    inset = "inset" + _c[pane].side
                    ,    rClass = o.resizerClass
                    ,    tClass = o.togglerClass
                    ,    _pane = "-" + pane // used for classNames
                    ,    _open = "-open"
                    ,    _closed = "-closed"
                    ,    _sliding = "-sliding"
                    ;
            $R
                    .css(side, sC[inset] + getPaneSize(pane))// move the resizer
                    .removeClass(rClass + _closed + " " + rClass + _pane + _closed)
                    .addClass(rClass + _open + " " + rClass + _pane + _open)
                    ;
            if (s.isSliding)
                $R.addClass(rClass + _sliding + " " + rClass + _pane + _sliding)
            else // in case 'was sliding'
                $R.removeClass(rClass + _sliding + " " + rClass + _pane + _sliding)

            if (o.resizerDblClickToggle)
                $R.bind("dblclick", toggle);
            removeHover(0, $R); // remove hover classes
            if (o.resizable && typeof $.fn.draggable == "function")
                $R
                        .draggable("enable")
                        .css("cursor", o.resizerCursor)
                        .attr("title", o.resizerTip)
                        ;
            else if (!s.isSliding)
                $R.css("cursor", "default"); // n-resize, s-resize, etc

            // if pane also has a toggler button, adjust that too
            if ($T) {
                $T
                        .removeClass(tClass + _closed + " " + tClass + _pane + _closed)
                        .addClass(tClass + _open + " " + tClass + _pane + _open)
                        .attr("title", o.togglerTip_open) // may be blank
                        ;
                removeHover(0, $T); // remove hover classes
                // toggler-content - if exists
                $T.children(".content-closed").hide();
                $T.children(".content-open").css("display", "block");
            }

            // sync any 'pin buttons'
            syncPinBtns(pane, !s.isSliding);

            // update pane-state dimensions - BEFORE resizing content
            $.extend(s, elDims($P));

            if (state.initialized) {
                // resize resizer & toggler sizes for all panes
                sizeHandles("all");
                // resize content every time pane opens - to be sure
                sizeContent(pane, true); // true = remeasure headers/footers, even if 'isLayoutBusy'
            }

            if (!skipCallback && (state.initialized || o.triggerEventsOnLoad) && $P.is(":visible")) {
                // onopen callback
                _execCallback(pane, o.onopen_end || o.onopen);
                // onshow callback - TODO: should this be here?
                if (s.isShowing) _execCallback(pane, o.onshow_end || o.onshow);
                // ALSO call onresize because layout-size *may* have changed while pane was closed
                if (state.initialized) {
                    _execCallback(pane, o.onresize_end || o.onresize);
                    resizeNestedLayout(pane);
                }
            }
        }


            /**
             * slideOpen / slideClose / slideToggle
             *
             * Pass-though methods for sliding
             */
                ,    slideOpen = function (evt_or_pane) {
            if (!isInitialized()) return;
            var
                    evt = isStr(evt_or_pane) ? null : evt_or_pane
                    ,    pane = evt ? $(this).data("layoutEdge") : evt_or_pane
                    ,    s = state[pane]
                    ,    delay = options[pane].slideDelay_open
                    ;
            // prevent event from triggering on NEW resizer binding created below
            if (evt) evt.stopImmediatePropagation();

            if (s.isClosed && evt && evt.type == "mouseenter" && delay > 0)
            // trigger = mouseenter - use a delay
                timer.set(pane + "_openSlider", open_NOW, delay);
            else
                open_NOW(); // will unbind events if is already open

            /**
             * SUBROUTINE for timed open
             */
            function open_NOW(evt) {
                if (!s.isClosed) // skip if no longer closed!
                    bindStopSlidingEvents(pane, true); // BIND trigger events to close sliding-pane
                else if (!_c[pane].isMoving)
                    open(pane, true); // true = slide - open() will handle binding
            }

            ;
        }

                ,    slideClose = function (evt_or_pane) {
            if (!isInitialized()) return;
            var
                    evt = isStr(evt_or_pane) ? null : evt_or_pane
                    ,    pane = evt ? $(this).data("layoutEdge") : evt_or_pane
                    ,    o = options[pane]
                    ,    s = state[pane]
                    ,    delay = _c[pane].isMoving ? 1000 : 300 // MINIMUM delay - option may override
                    ;

            if (s.isClosed || s.isResizing)
                return; // skip if already closed OR in process of resizing
            else if (o.slideTrigger_close == "click")
                close_NOW(); // close immediately onClick
            else if (o.preventQuickSlideClose && _c.isLayoutBusy)
                    return; // handle Chrome quick-close on slide-open
                else if (o.preventPrematureSlideClose && evt && $.layout.isMouseOverElem(evt, $Ps[pane]))
                        return; // handle incorrect mouseleave trigger, like when over a SELECT-list in IE
                    else if (evt) // trigger = mouseleave - use a delay
                        // 1 sec delay if 'opening', else .3 sec
                            timer.set(pane + "_closeSlider", close_NOW, max(o.slideDelay_close, delay));
                        else // called programically
                            close_NOW();

            /**
             * SUBROUTINE for timed close
             */
            function close_NOW() {
                if (s.isClosed) // skip 'close' if already closed!
                    bindStopSlidingEvents(pane, false); // UNBIND trigger events - TODO: is this needed here?
                else if (!_c[pane].isMoving)
                    close(pane); // close will handle unbinding
            }

            ;
        }

                ,    slideToggle = function (pane) {
            toggle(pane, true);
        }


            /**
             * Must set left/top on East/South panes so animation will work properly
             *
             * @param {string}  pane  The pane to lock, 'east' or 'south' - any other is ignored!
             * @param {boolean}  doLock  true = set left/top, false = remove
             */
                ,    lockPaneForFX = function (pane, doLock) {
            var $P = $Ps[pane];
            if (doLock) {
                $P.css({ zIndex: _c.zIndex.pane_animate }); // overlay all elements during animation
                if (pane == "south")
                    $P.css({ top: sC.insetTop + sC.innerHeight - $P.outerHeight() });
                else if (pane == "east")
                    $P.css({ left: sC.insetLeft + sC.innerWidth - $P.outerWidth() });
            }
            else { // animation DONE - RESET CSS
                // TODO: see if this can be deleted. It causes a quick-close when sliding in Chrome
                $P.css({ zIndex: (state[pane].isSliding ? _c.zIndex.pane_sliding : _c.zIndex.pane_normal) });
                if (pane == "south")
                    $P.css({ top: "auto" });
                else if (pane == "east")
                    $P.css({ left: "auto" });
                // fix anti-aliasing in IE - only needed for animations that change opacity
                var o = options[pane];
                if ($.layout.browser.msie && o.fxOpacityFix && o.fxName_open != "slide" && $P.css("filter") && $P.css("opacity") == 1)
                    $P[0].style.removeAttribute('filter');
            }
        }


            /**
             * Toggle sliding functionality of a specific pane on/off by adding removing 'slide open' trigger
             *
             * @see  open(), close()
             * @param {string}    pane    The pane to enable/disable, 'north', 'south', etc.
             * @param {boolean}    enable    Enable or Disable sliding?
             */
                ,    bindStartSlidingEvent = function (pane, enable) {
            var
                    o = options[pane]
                    ,    $P = $Ps[pane]
                    ,    $R = $Rs[pane]
                    ,    trigger = o.slideTrigger_open.toLowerCase()
                    ;
            if (!$R || (enable && !o.slidable)) return;

            // make sure we have a valid event
            if (trigger.match(/mouseover/))
                trigger = o.slideTrigger_open = "mouseenter";
            else if (!trigger.match(/click|dblclick|mouseenter/))
                trigger = o.slideTrigger_open = "click";

            $R
                // add or remove trigger event
                    [enable ? "bind" : "unbind"](trigger + '.' + sID, slideOpen)
                // set the appropriate cursor & title/tip
                    .css("cursor", enable ? o.sliderCursor : "default")
                    .attr("title", enable ? o.sliderTip : "")
                    ;
        }

            /**
             * Add or remove 'mouseleave' events to 'slide close' when pane is 'sliding' open or closed
             * Also increases zIndex when pane is sliding open
             * See bindStartSlidingEvent for code to control 'slide open'
             *
             * @see  slideOpen(), slideClose()
             * @param {string}    pane    The pane to process, 'north', 'south', etc.
             * @param {boolean}    enable    Enable or Disable events?
             */
                ,    bindStopSlidingEvents = function (pane, enable) {
            var
                    o = options[pane]
                    ,    s = state[pane]
                    ,    z = _c.zIndex
                    ,    trigger = o.slideTrigger_close.toLowerCase()
                    ,    action = (enable ? "bind" : "unbind")
                    ,    $P = $Ps[pane]
                    ,    $R = $Rs[pane]
                    ;
            s.isSliding = enable; // logic
            timer.clear(pane + "_closeSlider"); // just in case

            // remove 'slideOpen' trigger event from resizer
            // ALSO will raise the zIndex of the pane & resizer
            if (enable) bindStartSlidingEvent(pane, false);

            // RE/SET zIndex - increases when pane is sliding-open, resets to normal when not
            $P.css("zIndex", enable ? z.pane_sliding : z.pane_normal);
            $R.css("zIndex", enable ? z.pane_sliding : z.resizer_normal);

            // make sure we have a valid event
            if (!trigger.match(/click|mouseleave/))
                trigger = o.slideTrigger_close = "mouseleave"; // also catches 'mouseout'

            // add/remove slide triggers
            $R[action](trigger, slideClose); // base event on resize
            // need extra events for mouseleave
            if (trigger == "mouseleave") {
                // also close on pane.mouseleave
                $P[action]("mouseleave." + sID, slideClose);
                // cancel timer when mouse moves between 'pane' and 'resizer'
                $R[action]("mouseenter." + sID, cancelMouseOut);
                $P[action]("mouseenter." + sID, cancelMouseOut);
            }

            if (!enable)
                timer.clear(pane + "_closeSlider");
            else if (trigger == "click" && !o.resizable) {
                // IF pane is not resizable (which already has a cursor and tip)
                // then set the a cursor & title/tip on resizer when sliding
                $R.css("cursor", enable ? o.sliderCursor : "default");
                $R.attr("title", enable ? o.togglerTip_open : ""); // use Toggler-tip, eg: "Close Pane"
            }

            // SUBROUTINE for mouseleave timer clearing
            function cancelMouseOut(evt) {
                timer.clear(pane + "_closeSlider");
                evt.stopPropagation();
            }
        }


            /**
             * Hides/closes a pane if there is insufficient room - reverses this when there is room again
             * MUST have already called setSizeLimits() before calling this method
             *
             * @param {string}        pane            The pane being resized
             * @param {boolean=}    isOpening        Called from onOpen?
             * @param {boolean=}    skipCallback    Should the onresize callback be run?
             * @param {boolean=}    force
             */
                ,    makePaneFit = function (pane, isOpening, skipCallback, force) {
            var
                    o = options[pane]
                    ,    s = state[pane]
                    ,    c = _c[pane]
                    ,    $P = $Ps[pane]
                    ,    $R = $Rs[pane]
                    ,    isSidePane = c.dir == "vert"
                    ,    hasRoom = false
                    ;

            // special handling for center & east/west panes
            if (pane == "center" || (isSidePane && s.noVerticalRoom)) {
                // see if there is enough room to display the pane
                // ERROR: hasRoom = s.minHeight <= s.maxHeight && (isSidePane || s.minWidth <= s.maxWidth);
                hasRoom = (s.maxHeight > 0);
                if (hasRoom && s.noRoom) { // previously hidden due to noRoom, so show now
                    $P.show();
                    if ($R) $R.show();
                    s.isVisible = true;
                    s.noRoom = false;
                    if (isSidePane) s.noVerticalRoom = false;
                    _fixIframe(pane);
                }
                else if (!hasRoom && !s.noRoom) { // not currently hidden, so hide now
                    $P.hide();
                    if ($R) $R.hide();
                    s.isVisible = false;
                    s.noRoom = true;
                }
            }

            // see if there is enough room to fit the border-pane
            if (pane == "center") {
                // ignore center in this block
            }
            else if (s.minSize <= s.maxSize) { // pane CAN fit
                hasRoom = true;
                if (s.size > s.maxSize) // pane is too big - shrink it
                    sizePane(pane, s.maxSize, skipCallback, force);
                else if (s.size < s.minSize) // pane is too small - enlarge it
                    sizePane(pane, s.minSize, skipCallback, force);
                else if ($R && $P.is(":visible")) {
                        // make sure resizer-bar is positioned correctly
                        // handles situation where nested layout was 'hidden' when initialized
                        var
                                side = c.side.toLowerCase()
                                ,    pos = s.size + sC["inset" + c.side]
                                ;
                        if ($.layout.cssNum($R, side) != pos) $R.css(side, pos);
                    }

                // if was previously hidden due to noRoom, then RESET because NOW there is room
                if (s.noRoom) {
                    // s.noRoom state will be set by open or show
                    if (s.wasOpen && o.closable) {
                        if (o.autoReopen)
                            open(pane, false, true, true); // true = noAnimation, true = noAlert
                        else // leave the pane closed, so just update state
                            s.noRoom = false;
                    }
                    else
                        show(pane, s.wasOpen, true, true); // true = noAnimation, true = noAlert
                }
            }
            else { // !hasRoom - pane CANNOT fit
                if (!s.noRoom) { // pane not set as noRoom yet, so hide or close it now...
                    s.noRoom = true; // update state
                    s.wasOpen = !s.isClosed && !s.isSliding;
                    if (s.isClosed) {
                    } // SKIP
                    else if (o.closable) // 'close' if possible
                        close(pane, true, true); // true = force, true = noAnimation
                    else // 'hide' pane if cannot just be closed
                        hide(pane, true); // true = noAnimation
                }
            }
        }


            /**
             * sizePane / manualSizePane
             * sizePane is called only by internal methods whenever a pane needs to be resized
             * manualSizePane is an exposed flow-through method allowing extra code when pane is 'manually resized'
             *
             * @param {string}        pane            The pane being resized
             * @param {number}        size            The *desired* new size for this pane - will be validated
             * @param {boolean=}        skipCallback    Should the onresize callback be run?
             */
                ,    manualSizePane = function (pane, size, skipCallback) {
            if (!isInitialized()) return;
            // ANY call to sizePane will disabled autoResize
            var
                    o = options[pane]
                //	if resizing callbacks have been delayed and resizing is now DONE, force resizing to complete...
                    ,    forceResize = o.resizeWhileDragging && !_c.isLayoutBusy //  && !o.triggerEventsWhileDragging
                    ;
            o.autoResize = false;
            // flow-through...
            sizePane(pane, size, skipCallback, forceResize);
        }

            /**
             * @param {string}        pane            The pane being resized
             * @param {number}        size            The *desired* new size for this pane - will be validated
             * @param {boolean=}        skipCallback    Should the onresize callback be run?
             * @param {boolean=}        force            Force resizing even if does not seem necessary
             */
                ,    sizePane = function (pane, size, skipCallback, force) {
            if (!isInitialized()) return;
            var
                    o = options[pane]
                    ,    s = state[pane]
                    ,    $P = $Ps[pane]
                    ,    $R = $Rs[pane]
                    ,    side = _c[pane].side.toLowerCase()
                    ,    dimName = _c[pane].sizeType.toLowerCase()
                    ,    inset = "inset" + _c[pane].side
                    ,    skipResizeWhileDragging = _c.isLayoutBusy && !o.triggerEventsWhileDragging
                    ,    oldSize
                    ;
            // calculate 'current' min/max sizes
            setSizeLimits(pane); // update pane-state
            oldSize = s.size;

            size = _parseSize(pane, size); // handle percentages & auto
            size = max(size, _parseSize(pane, o.minSize));
            size = min(size, s.maxSize);
            if (size < s.minSize) { // not enough room for pane!
                makePaneFit(pane, false, skipCallback);	// will hide or close pane
                return;
            }

            // IF newSize is same as oldSize, then nothing to do - abort
            if (!force && size == oldSize) return;

            // onresize_start callback CANNOT cancel resizing because this would break the layout!
            if (!skipCallback && state.initialized && s.isVisible)
                _execCallback(pane, o.onresize_start);

            // resize the pane, and make sure its visible
            $P.css(dimName, max(1, cssSize(pane, size)));

            /*
             var
             edge	= _c[pane].sizeType.toLowerCase()
             ,	test	= [{
             target:		size
             ,	attempt:	size
             ,	actual:		edge=='width' ? $P.outerWidth() : $P.outerHeight()
             }]
             ,	lastTest = test[0]
             ,	thisTest = {}
             ;
             while (lastTest.actual != size) {
             test.push( {} );
             thisTest = test[ test.length - 1 ];

             if (lastTest.actual > size)
             thisTest.attempt = Math.max(1, lastTest.attempt - (lastTest.actual - size));
             else // lastTest.actual < size
             thisTest.attempt = Math.max(1, lastTest.attempt + (size - lastTest.actual));

             $P.css( edge, cssSize(pane, thisTest.attempt) );

             thisTest.actual = edge=='width' ? $P.outerWidth() : $P.outerHeight()

             // after 3 tries, is as close as its gonna get!
             if (test.length == 3) break;
             else lastTest = thisTest;
             }
             debugData( test, pane );
             */

            // update pane-state dimensions
            s.size = size;
            $.extend(s, elDims($P));

            // reposition the resizer-bar
            if ($R && $P.is(":visible")) $R.css(side, size + sC[inset]);

            sizeContent(pane);

            if (!skipCallback && !skipResizeWhileDragging && state.initialized && s.isVisible) {
                _execCallback(pane, o.onresize_end || o.onresize);
                resizeNestedLayout(pane);
            }

            // resize all the adjacent panes, and adjust their toggler buttons
            // when skipCallback passed, it means the controlling method will handle 'other panes'
            if (!skipCallback) {
                // also no callback if live-resize is in progress and NOT triggerEventsWhileDragging
                if (!s.isSliding) sizeMidPanes(_c[pane].dir == "horz" ? "all" : "center", skipResizeWhileDragging, force);
                sizeHandles("all");
            }

            // if opposite-pane was autoClosed, see if it can be autoOpened now
            var altPane = _c.altSide[pane];
            if (size < oldSize && state[ altPane ].noRoom) {
                setSizeLimits(altPane);
                makePaneFit(altPane, false, skipCallback);
            }
        }

            /**
             * @see  initPanes(), sizePane(), resizeAll(), open(), close(), hide()
             * @param {string}    panes            The pane(s) being resized, comma-delmited string
             * @param {boolean=}    skipCallback    Should the onresize callback be run?
             * @param {boolean=}    force
             */
                ,    sizeMidPanes = function (panes, skipCallback, force) {
            if (!panes || panes == "all") panes = "east,west,center";

            $.each(panes.split(","), function (i, pane) {
                if (!$Ps[pane]) return; // NO PANE - skip
                var
                        o = options[pane]
                        ,    s = state[pane]
                        ,    $P = $Ps[pane]
                        ,    $R = $Rs[pane]
                        ,    isCenter = (pane == "center")
                        ,    hasRoom = true
                        ,    CSS = {}
                        ,    newCenter = calcNewCenterPaneDims()
                        ;
                // update pane-state dimensions
                $.extend(s, elDims($P));

                if (pane == "center") {
                    if (!force && s.isVisible && newCenter.width == s.outerWidth && newCenter.height == s.outerHeight)
                        return true; // SKIP - pane already the correct size
                    // set state for makePaneFit() logic
                    $.extend(s, cssMinDims(pane), {
                        maxWidth:    newCenter.width
                        ,    maxHeight:    newCenter.height
                    });
                    CSS = newCenter;
                    // convert OUTER width/height to CSS width/height
                    CSS.width = cssW(pane, CSS.width);
                    CSS.height = cssH(pane, CSS.height);
                    hasRoom = CSS.width > 0 && CSS.height > 0;
                    // during layout init, try to shrink east/west panes to make room for center
                    if (!hasRoom && !state.initialized && o.minWidth > 0) {
                        var
                                reqPx = o.minWidth - s.outerWidth
                                ,    minE = options.east.minSize || 0
                                ,    minW = options.west.minSize || 0
                                ,    sizeE = state.east.size
                                ,    sizeW = state.west.size
                                ,    newE = sizeE
                                ,    newW = sizeW
                                ;
                        if (reqPx > 0 && state.east.isVisible && sizeE > minE) {
                            newE = max(sizeE - minE, sizeE - reqPx);
                            reqPx -= sizeE - newE;
                        }
                        if (reqPx > 0 && state.west.isVisible && sizeW > minW) {
                            newW = max(sizeW - minW, sizeW - reqPx);
                            reqPx -= sizeW - newW;
                        }
                        // IF we found enough extra space, then resize the border panes as calculated
                        if (reqPx == 0) {
                            if (sizeE != minE)
                                sizePane('east', newE, true); // true = skipCallback - initPanes will handle when done
                            if (sizeW != minW)
                                sizePane('west', newW, true);
                            // now start over!
                            sizeMidPanes('center', skipCallback, force);
                            return; // abort this loop
                        }
                    }
                }
                else { // for east and west, set only the height, which is same as center height
                    // set state.min/maxWidth/Height for makePaneFit() logic
                    if (s.isVisible && !s.noVerticalRoom)
                        $.extend(s, elDims($P), cssMinDims(pane))
                    if (!force && !s.noVerticalRoom && newCenter.height == s.outerHeight)
                        return true; // SKIP - pane already the correct size
                    // east/west have same top, bottom & height as center
                    CSS.top = newCenter.top;
                    CSS.bottom = newCenter.bottom;
                    CSS.height = cssH(pane, newCenter.height);
                    s.maxHeight = max(0, CSS.height);
                    hasRoom = (s.maxHeight > 0);
                    if (!hasRoom) s.noVerticalRoom = true; // makePaneFit() logic
                }

                if (hasRoom) {
                    // resizeAll passes skipCallback because it triggers callbacks after ALL panes are resized
                    if (!skipCallback && state.initialized)
                        _execCallback(pane, o.onresize_start);

                    $P.css(CSS); // apply the CSS to pane
                    if (s.noRoom && !s.isClosed && !s.isHidden)
                        makePaneFit(pane); // will re-open/show auto-closed/hidden pane
                    if (s.isVisible) {
                        $.extend(s, elDims($P)); // update pane dimensions
                        if (state.initialized) sizeContent(pane); // also resize the contents, if exists
                    }
                }
                else if (!s.noRoom && s.isVisible) // no room for pane
                    makePaneFit(pane); // will hide or close pane

                if (!s.isVisible)
                    return true; // DONE - next pane

                /*
                 * Extra CSS for IE6 or IE7 in Quirks-mode - add 'width' to NORTH/SOUTH panes
                 * Normally these panes have only 'left' & 'right' positions so pane auto-sizes
                 * ALSO required when pane is an IFRAME because will NOT default to 'full width'
                 */
                if (pane == "center") { // finished processing midPanes
                    var b = $.layout.browser;
                    var fix = b.isIE6 || (b.msie && !b.boxModel);
                    if ($Ps.north && (fix || state.north.tagName == "IFRAME"))
                        $Ps.north.css("width", cssW($Ps.north, sC.innerWidth));
                    if ($Ps.south && (fix || state.south.tagName == "IFRAME"))
                        $Ps.south.css("width", cssW($Ps.south, sC.innerWidth));
                }

                // resizeAll passes skipCallback because it triggers callbacks after ALL panes are resized
                if (!skipCallback && state.initialized) {
                    _execCallback(pane, o.onresize_end || o.onresize);
                    resizeNestedLayout(pane);
                }
            });
        }


            /**
             * @see  window.onresize(), callbacks or custom code
             */
                ,    resizeAll = function () {
            if (!state.initialized) {
                _initLayoutElements();
                return; // no need to resize since we just initialized!
            }
            var oldW = sC.innerWidth
                    ,    oldH = sC.innerHeight
                    ;
            // cannot size layout when 'container' is hidden or collapsed
            if (!$N.is(":visible:")) return;
            $.extend(state.container, elDims($N)); // UPDATE container dimensions
            if (!sC.outerHeight) return;

            // onresizeall_start will CANCEL resizing if returns false
            // state.container has already been set, so user can access this info for calcuations
            if (false === _execCallback(null, options.onresizeall_start)) return false;

            var // see if container is now 'smaller' than before
                    shrunkH = (sC.innerHeight < oldH)
                    ,    shrunkW = (sC.innerWidth < oldW)
                    ,    $P, o, s, dir
                    ;
            // NOTE special order for sizing: S-N-E-W
            $.each(["south","north","east","west"], function (i, pane) {
                if (!$Ps[pane]) return; // no pane - SKIP
                s = state[pane];
                o = options[pane];
                dir = _c[pane].dir;

                if (o.autoResize && s.size != o.size) // resize pane to original size set in options
                    sizePane(pane, o.size, true, true); // true=skipCallback, true=forceResize
                else {
                    setSizeLimits(pane);
                    makePaneFit(pane, false, true, true); // true=skipCallback, true=forceResize
                }
            });

            sizeMidPanes("all", true, true); // true=skipCallback, true=forceResize
            sizeHandles("all"); // reposition the toggler elements

            // trigger all individual pane callbacks AFTER layout has finished resizing
            o = options; // reuse alias
            $.each(_c.allPanes.split(","), function (i, pane) {
                $P = $Ps[pane];
                if (!$P) return; // SKIP
                if (state[pane].isVisible) { // undefined for non-existent panes
                    _execCallback(pane, o[pane].onresize_end || o[pane].onresize); // callback - if exists
                    resizeNestedLayout(pane);
                }
            });

            _execCallback(null, o.onresizeall_end || o.onresizeall); // onresizeall callback, if exists
        }


            /**
             * Whenever a pane resizes or opens that has a nested layout, trigger resizeAll
             *
             * @param {string}        pane        The pane just resized or opened
             */
                ,    resizeNestedLayout = function (pane) {
            var
                    $P = $Ps[pane]
                    ,    $C = $Cs[pane]
                    ,    d = "layoutContainer"
                    ;
            if (options[pane].resizeNestedLayout) {
                if ($P.data(d))
                    $P.layout().resizeAll();
                else if ($C && $C.data(d))
                    $C.layout().resizeAll();
            }
        }


            /**
             * IF pane has a content-div, then resize all elements inside pane to fit pane-height
             *
             * @param {string=}        panes        The pane(s) being resized
             * @param {boolean=}    remeasure    Should the content (header/footer) be remeasured?
             */
                ,    sizeContent = function (panes, remeasure) {
            if (!isInitialized()) return;
            if (!panes || panes == "all") panes = _c.allPanes;
            $.each(panes.split(","), function (idx, pane) {
                var
                        $P = $Ps[pane]
                        ,    $C = $Cs[pane]
                        ,    o = options[pane]
                        ,    s = state[pane]
                        ,    m = s.content // m = measurements
                        ;
                if (!$P || !$C || !$P.is(":visible")) return true; // NOT VISIBLE - skip

                // onsizecontent_start will CANCEL resizing if returns false
                if (false === _execCallback(null, o.onsizecontent_start)) return;

                // skip re-measuring offsets if live-resizing
                if (!_c.isLayoutBusy || m.top == undefined || remeasure || o.resizeContentWhileDragging) {
                    _measure();
                    // if any footers are below pane-bottom, they may not measure correctly,
                    // so allow pane overflow and re-measure
                    if (m.hiddenFooters > 0 && $P.css("overflow") == "hidden") {
                        $P.css("overflow", "visible");
                        _measure(); // remeasure while overflowing
                        $P.css("overflow", "hidden");
                    }
                }
                // NOTE: spaceAbove/Below *includes* the pane paddingTop/Bottom, but not pane.borders
                var newH = s.innerHeight - (m.spaceAbove - s.css.paddingTop) - (m.spaceBelow - s.css.paddingBottom);
                if (!$C.is(":visible") || m.height != newH) {
                    // size the Content element to fit new pane-size - will autoHide if not enough room
                    setOuterHeight($C, newH, true); // true=autoHide
                    m.height = newH; // save new height
                }
                ;

                if (state.initialized) {
                    _execCallback(pane, o.onsizecontent_end || o.onsizecontent);
                    resizeNestedLayout(pane);
                }


                function _below($E) {
                    return max(s.css.paddingBottom, (parseInt($E.css("marginBottom"), 10) || 0));
                }

                ;

                function _measure() {
                    var
                            ignore = options[pane].contentIgnoreSelector
                            ,    $Fs = $C.nextAll().not(ignore || ':lt(0)') // not :lt(0) = ALL
                            ,    $Fs_vis = $Fs.filter(':visible')
                            ,    $F = $Fs_vis.filter(':last')
                            ;
                    m = {
                        top:            $C[0].offsetTop
                        ,    height:            $C.outerHeight()
                        ,    numFooters:        $Fs.length
                        ,    hiddenFooters:    $Fs.length - $Fs_vis.length
                        ,    spaceBelow:        0 // correct if no content footer ($E)
                    }
                    m.spaceAbove = m.top; // just for state - not used in calc
                    m.bottom = m.top + m.height;
                    if ($F.length)
                    //spaceBelow = (LastFooter.top + LastFooter.height) [footerBottom] - Content.bottom + max(LastFooter.marginBottom, pane.paddingBotom)
                        m.spaceBelow = ($F[0].offsetTop + $F.outerHeight()) - m.bottom + _below($F);
                    else // no footer - check marginBottom on Content element itself
                        m.spaceBelow = _below($C);
                }

                ;
            });
        }


            /**
             * Called every time a pane is opened, closed, or resized to slide the togglers to 'center' and adjust their length if necessary
             *
             * @see  initHandles(), open(), close(), resizeAll()
             * @param {string=}        panes        The pane(s) being resized
             */
                ,    sizeHandles = function (panes) {
            if (!panes || panes == "all") panes = _c.borderPanes;

            $.each(panes.split(","), function (i, pane) {
                var
                        o = options[pane]
                        ,    s = state[pane]
                        ,    $P = $Ps[pane]
                        ,    $R = $Rs[pane]
                        ,    $T = $Ts[pane]
                        ,    $TC
                        ;
                if (!$P || !$R) return;

                var
                        dir = _c[pane].dir
                        ,    _state = (s.isClosed ? "_closed" : "_open")
                        ,    spacing = o["spacing" + _state]
                        ,    togAlign = o["togglerAlign" + _state]
                        ,    togLen = o["togglerLength" + _state]
                        ,    paneLen
                        ,    offset
                        ,    CSS = {}
                        ;

                if (spacing == 0) {
                    $R.hide();
                    return;
                }
                else if (!s.noRoom && !s.isHidden) // skip if resizer was hidden for any reason
                    $R.show(); // in case was previously hidden

                // Resizer Bar is ALWAYS same width/height of pane it is attached to
                if (dir == "horz") { // north/south
                    paneLen = $P.outerWidth(); // s.outerWidth ||
                    s.resizerLength = paneLen;
                    $R.css({
                        width:    max(1, cssW($R, paneLen)) // account for borders & padding
                        ,    height:    max(0, cssH($R, spacing)) // ditto
                        ,    left:    $.layout.cssNum($P, "left")
                    });
                }
                else { // east/west
                    paneLen = $P.outerHeight(); // s.outerHeight ||
                    s.resizerLength = paneLen;
                    $R.css({
                        height:    max(1, cssH($R, paneLen)) // account for borders & padding
                        ,    width:    max(0, cssW($R, spacing)) // ditto
                        ,    top:    sC.insetTop + getPaneSize("north", true) // TODO: what if no North pane?
                        //,	top:	$.layout.cssNum($Ps["center"], "top")
                    });
                }

                // remove hover classes
                removeHover(o, $R);

                if ($T) {
                    if (togLen == 0 || (s.isSliding && o.hideTogglerOnSlide)) {
                        $T.hide(); // always HIDE the toggler when 'sliding'
                        return;
                    }
                    else
                        $T.show(); // in case was previously hidden

                    if (!(togLen > 0) || togLen == "100%" || togLen > paneLen) {
                        togLen = paneLen;
                        offset = 0;
                    }
                    else { // calculate 'offset' based on options.PANE.togglerAlign_open/closed
                        if (isStr(togAlign)) {
                            switch (togAlign) {
                                case "top":
                                case "left":    offset = 0;
                                    break;
                                case "bottom":
                                case "right":    offset = paneLen - togLen;
                                    break;
                                case "middle":
                                case "center":
                                default:        offset = Math.floor((paneLen - togLen) / 2); // 'default' catches typos
                            }
                        }
                        else { // togAlign = number
                            var x = parseInt(togAlign, 10); //
                            if (togAlign >= 0) offset = x;
                            else offset = paneLen - togLen + x; // NOTE: x is negative!
                        }
                    }

                    if (dir == "horz") { // north/south
                        var width = cssW($T, togLen);
                        $T.css({
                            width:    max(0, width)  // account for borders & padding
                            ,    height:    max(1, cssH($T, spacing)) // ditto
                            ,    left:    offset // TODO: VERIFY that toggler  positions correctly for ALL values
                            ,    top:    0
                        });
                        // CENTER the toggler content SPAN
                        $T.children(".content").each(function() {
                            $TC = $(this);
                            $TC.css("marginLeft", Math.floor((width - $TC.outerWidth()) / 2)); // could be negative
                        });
                    }
                    else { // east/west
                        var height = cssH($T, togLen);
                        $T.css({
                            height:    max(0, height)  // account for borders & padding
                            ,    width:    max(1, cssW($T, spacing)) // ditto
                            ,    top:    offset // POSITION the toggler
                            ,    left:    0
                        });
                        // CENTER the toggler content SPAN
                        $T.children(".content").each(function() {
                            $TC = $(this);
                            $TC.css("marginTop", Math.floor((height - $TC.outerHeight()) / 2)); // could be negative
                        });
                    }

                    // remove ALL hover classes
                    removeHover(0, $T);
                }

                // DONE measuring and sizing this resizer/toggler, so can be 'hidden' now
                if (!state.initialized && (o.initHidden || s.noRoom)) {
                    $R.hide();
                    if ($T) $T.hide();
                }
            });
        }


                ,    enableClosable = function (pane) {
            if (!isInitialized()) return;
            var $T = $Ts[pane], o = options[pane];
            if (!$T) return;
            o.closable = true;
            $T.bind("click." + sID, function(evt) {
                evt.stopPropagation();
                toggle(pane);
            })
                    .bind("mouseenter." + sID, addHover)
                    .bind("mouseleave." + sID, removeHover)
                    .css("visibility", "visible")
                    .css("cursor", "pointer")
                    .attr("title", state[pane].isClosed ? o.togglerTip_closed : o.togglerTip_open)// may be blank
                    .show()
                    ;
        }

                ,    disableClosable = function (pane, hide) {
            if (!isInitialized()) return;
            var $T = $Ts[pane];
            if (!$T) return;
            options[pane].closable = false;
            // is closable is disable, then pane MUST be open!
            if (state[pane].isClosed) open(pane, false, true);
            $T.unbind("." + sID)
                    .css("visibility", hide ? "hidden" : "visible")// instead of hide(), which creates logic issues
                    .css("cursor", "default")
                    .attr("title", "")
                    ;
        }


                ,    enableSlidable = function (pane) {
            if (!isInitialized()) return;
            var $R = $Rs[pane], o = options[pane];
            if (!$R || !$R.data('draggable')) return;
            options[pane].slidable = true;
            if (s.isClosed)
                bindStartSlidingEvent(pane, true);
        }

                ,    disableSlidable = function (pane) {
            if (!isInitialized()) return;
            var $R = $Rs[pane];
            if (!$R) return;
            options[pane].slidable = false;
            if (state[pane].isSliding)
                close(pane, false, true);
            else {
                bindStartSlidingEvent(pane, false);
                $R.css("cursor", "default")
                        .attr("title", "")
                        ;
                removeHover(null, $R[0]); // in case currently hovered
            }
        }


                ,    enableResizable = function (pane) {
            if (!isInitialized()) return;
            var $R = $Rs[pane], o = options[pane];
            if (!$R || !$R.data('draggable')) return;
            o.resizable = true;
            $R.draggable("enable")
                    .bind("mouseenter." + sID, onResizerEnter)
                    .bind("mouseleave." + sID, onResizerLeave)
                    ;
            if (!state[pane].isClosed)
                $R.css("cursor", o.resizerCursor)
                        .attr("title", o.resizerTip)
                        ;
        }

                ,    disableResizable = function (pane) {
            if (!isInitialized()) return;
            var $R = $Rs[pane];
            if (!$R || !$R.data('draggable')) return;
            options[pane].resizable = false;
            $R.draggable("disable")
                    .unbind("." + sID)
                    .css("cursor", "default")
                    .attr("title", "")
                    ;
            removeHover(null, $R[0]); // in case currently hovered
        }


            /**
             * Move a pane from source-side (eg, west) to target-side (eg, east)
             * If pane exists on target-side, move that to source-side, ie, 'swap' the panes
             *
             * @param {string}    pane1        The pane/edge being swapped
             * @param {string}    pane2        ditto
             */
                ,    swapPanes = function (pane1, pane2) {
            if (!isInitialized()) return;
            // change state.edge NOW so callbacks can know where pane is headed...
            state[pane1].edge = pane2;
            state[pane2].edge = pane1;
            // run these even if NOT state.initialized
            var cancelled = false;
            if (false === _execCallback(pane1, options[pane1].onswap_start)) cancelled = true;
            if (!cancelled && false === _execCallback(pane2, options[pane2].onswap_start)) cancelled = true;
            if (cancelled) {
                state[pane1].edge = pane1; // reset
                state[pane2].edge = pane2;
                return;
            }

            var
                    oPane1 = copy(pane1)
                    ,    oPane2 = copy(pane2)
                    ,    sizes = {}
                    ;
            sizes[pane1] = oPane1 ? oPane1.state.size : 0;
            sizes[pane2] = oPane2 ? oPane2.state.size : 0;

            // clear pointers & state
            $Ps[pane1] = false;
            $Ps[pane2] = false;
            state[pane1] = {};
            state[pane2] = {};

            // ALWAYS remove the resizer & toggler elements
            if ($Ts[pane1]) $Ts[pane1].remove();
            if ($Ts[pane2]) $Ts[pane2].remove();
            if ($Rs[pane1]) $Rs[pane1].remove();
            if ($Rs[pane2]) $Rs[pane2].remove();
            $Rs[pane1] = $Rs[pane2] = $Ts[pane1] = $Ts[pane2] = false;

            // transfer element pointers and data to NEW Layout keys
            move(oPane1, pane2);
            move(oPane2, pane1);

            // cleanup objects
            oPane1 = oPane2 = sizes = null;

            // make panes 'visible' again
            if ($Ps[pane1]) $Ps[pane1].css(_c.visible);
            if ($Ps[pane2]) $Ps[pane2].css(_c.visible);

            // fix any size discrepancies caused by swap
            resizeAll();

            // run these even if NOT state.initialized
            _execCallback(pane1, options[pane1].onswap_end || options[pane1].onswap);
            _execCallback(pane2, options[pane2].onswap_end || options[pane2].onswap);

            return;

            function copy(n) { // n = pane
                var
                        $P = $Ps[n]
                        ,    $C = $Cs[n]
                        ;
                return !$P ? false : {
                    pane:        n
                    ,    P:            $P ? $P[0] : false
                    ,    C:            $C ? $C[0] : false
                    ,    state:        $.extend({}, state[n])
                    ,    options:    $.extend({}, options[n])
                }
            }

            ;

            function move(oPane, pane) {
                if (!oPane) return;
                var
                        P = oPane.P
                        ,    C = oPane.C
                        ,    oldPane = oPane.pane
                        ,    c = _c[pane]
                        ,    side = c.side.toLowerCase()
                        ,    inset = "inset" + c.side
                    //	save pane-options that should be retained
                        ,    s = $.extend({}, state[pane])
                        ,    o = options[pane]
                    //	RETAIN side-specific FX Settings - more below
                        ,    fx = { resizerCursor: o.resizerCursor }
                        ,    re, size, pos
                        ;
                $.each("fxName,fxSpeed,fxSettings".split(","), function (i, k) {
                    fx[k] = o[k];
                    fx[k + "_open"] = o[k + "_open"];
                    fx[k + "_close"] = o[k + "_close"];
                });

                // update object pointers and attributes
                $Ps[pane] = $(P)
                        .data("layoutEdge", pane)
                        .css(_c.hidden)
                        .css(c.cssReq)
                        ;
                $Cs[pane] = C ? $(C) : false;

                // set options and state
                options[pane] = $.extend({}, oPane.options, fx);
                state[pane] = $.extend({}, oPane.state);

                // change classNames on the pane, eg: ui-layout-pane-east ==> ui-layout-pane-west
                re = new RegExp(o.paneClass + "-" + oldPane, "g");
                P.className = P.className.replace(re, o.paneClass + "-" + pane);

                // ALWAYS regenerate the resizer & toggler elements
                initHandles(pane); // create the required resizer & toggler

                // if moving to different orientation, then keep 'target' pane size
                if (c.dir != _c[oldPane].dir) {
                    size = sizes[pane] || 0;
                    setSizeLimits(pane); // update pane-state
                    size = max(size, state[pane].minSize);
                    // use manualSizePane to disable autoResize - not useful after panes are swapped
                    manualSizePane(pane, size, true); // true = skipCallback
                }
                else // move the resizer here
                    $Rs[pane].css(side, sC[inset] + (state[pane].isVisible ? getPaneSize(pane) : 0));


                // ADD CLASSNAMES & SLIDE-BINDINGS
                if (oPane.state.isVisible && !s.isVisible)
                    setAsOpen(pane, true); // true = skipCallback
                else {
                    setAsClosed(pane);
                    bindStartSlidingEvent(pane, true); // will enable events IF option is set
                }

                // DESTROY the object
                oPane = null;
            }

            ;
        }


                ;	// END var DECLARATIONS

        /**
         * Capture keys when enableCursorHotkey - toggle pane if hotkey pressed
         *
         * @see  document.keydown()
         */
        function keyDown(evt) {
            if (!evt) return true;
            var code = evt.keyCode;
            if (code < 33) return true; // ignore special keys: ENTER, TAB, etc

            var
                    PANE = {
                        38: "north" // Up Cursor	- $.ui.keyCode.UP
                        ,    40: "south" // Down Cursor	- $.ui.keyCode.DOWN
                        ,    37: "west"  // Left Cursor	- $.ui.keyCode.LEFT
                        ,    39: "east"  // Right Cursor	- $.ui.keyCode.RIGHT
                    }
                    ,    ALT = evt.altKey // no worky!
                    ,    SHIFT = evt.shiftKey
                    ,    CTRL = evt.ctrlKey
                    ,    CURSOR = (CTRL && code >= 37 && code <= 40)
                    ,    o, k, m, pane
                    ;

            if (CURSOR && options[PANE[code]].enableCursorHotkey) // valid cursor-hotkey
                pane = PANE[code];
            else if (CTRL || SHIFT) // check to see if this matches a custom-hotkey
                $.each(_c.borderPanes.split(","), function (i, p) { // loop each pane to check its hotkey
                    o = options[p];
                    k = o.customHotkey;
                    m = o.customHotkeyModifier; // if missing or invalid, treated as "CTRL+SHIFT"
                    if ((SHIFT && m == "SHIFT") || (CTRL && m == "CTRL") || (CTRL && SHIFT)) { // Modifier matches
                        if (k && code == (isNaN(k) || k <= 9 ? k.toUpperCase().charCodeAt(0) : k)) { // Key matches
                            pane = p;
                            return false; // BREAK
                        }
                    }
                });

            // validate pane
            if (!pane || !$Ps[pane] || !options[pane].closable || state[pane].isHidden)
                return true;

            toggle(pane);

            evt.stopPropagation();
            evt.returnValue = false; // CANCEL key
            return false;
        }

        ;


        /*
         * ######################################
         *	UTILITY METHODS
         *	called externally or by initButtons
         * ######################################
         */

        /**
         * Change/reset a pane overflow setting & zIndex to allow popups/drop-downs to work
         *
         * @param {Object=}   el        (optional) Can also be 'bound' to a click, mouseOver, or other event
         */
        function allowOverflow(el) {
            if (!isInitialized()) return;
            if (this && this.tagName) el = this; // BOUND to element
            var $P;
            if (isStr(el))
                $P = $Ps[el];
            else if ($(el).data("layoutRole"))
                $P = $(el);
            else
                $(el).parents().each(function() {
                    if ($(this).data("layoutRole")) {
                        $P = $(this);
                        return false; // BREAK
                    }
                });
            if (!$P || !$P.length) return; // INVALID

            var
                    pane = $P.data("layoutEdge")
                    ,    s = state[pane]
                    ;

            // if pane is already raised, then reset it before doing it again!
            // this would happen if allowOverflow is attached to BOTH the pane and an element
            if (s.cssSaved)
                resetOverflow(pane); // reset previous CSS before continuing

            // if pane is raised by sliding or resizing, or its closed, then abort
            if (s.isSliding || s.isResizing || s.isClosed) {
                s.cssSaved = false;
                return;
            }

            var
                    newCSS = { zIndex: (_c.zIndex.pane_normal + 2) }
                    ,    curCSS = {}
                    ,    of = $P.css("overflow")
                    ,    ofX = $P.css("overflowX")
                    ,    ofY = $P.css("overflowY")
                    ;
            // determine which, if any, overflow settings need to be changed
            if (of != "visible") {
                curCSS.overflow = of;
                newCSS.overflow = "visible";
            }
            if (ofX && !ofX.match(/visible|auto/)) {
                curCSS.overflowX = ofX;
                newCSS.overflowX = "visible";
            }
            if (ofY && !ofY.match(/visible|auto/)) {
                curCSS.overflowY = ofX;
                newCSS.overflowY = "visible";
            }

            // save the current overflow settings - even if blank!
            s.cssSaved = curCSS;

            // apply new CSS to raise zIndex and, if necessary, make overflow 'visible'
            $P.css(newCSS);

            // make sure the zIndex of all other panes is normal
            $.each(_c.allPanes.split(","), function(i, p) {
                if (p != pane) resetOverflow(p);
            });

        }

        ;

        function resetOverflow(el) {
            if (!isInitialized()) return;
            if (this && this.tagName) el = this; // BOUND to element
            var $P;
            if (isStr(el))
                $P = $Ps[el];
            else if ($(el).data("layoutRole"))
                $P = $(el);
            else
                $(el).parents().each(function() {
                    if ($(this).data("layoutRole")) {
                        $P = $(this);
                        return false; // BREAK
                    }
                });
            if (!$P || !$P.length) return; // INVALID

            var
                    pane = $P.data("layoutEdge")
                    ,    s = state[pane]
                    ,    CSS = s.cssSaved || {}
                    ;
            // reset the zIndex
            if (!s.isSliding && !s.isResizing)
                $P.css("zIndex", _c.zIndex.pane_normal);

            // reset Overflow - if necessary
            $P.css(CSS);

            // clear var
            s.cssSaved = false;
        }

        ;


        /**
         * Helper function to validate params received by addButton utilities
         *
         * Two classes are added to the element, based on the buttonClass...
         * The type of button is appended to create the 2nd className:
         *  - ui-layout-button-pin
         *  - ui-layout-pane-button-toggle
         *  - ui-layout-pane-button-open
         *  - ui-layout-pane-button-close
         *
         * @param  {(string|!Object)}    selector    jQuery selector (or element) for button, eg: ".ui-layout-north .toggle-button"
         * @param  {string}               pane         Name of the pane the button is for: 'north', 'south', etc.
         * @return {Array.<Object>}        If both params valid, the element matching 'selector' in a jQuery wrapper - otherwise returns null
         */
        function getBtn(selector, pane, action) {
            var $E = $(selector)
                    ,    err = options.showErrorMessages;
            if (!$E.length) { // element not found
                if (err) alert(lang.errButton + lang.selector + ": " + selector);
            }
            else if (_c.borderPanes.indexOf(pane) == -1) { // invalid 'pane' sepecified
                if (err) alert(lang.errButton + lang.pane + ": " + pane);
            }
            else { // VALID
                var btn = options[pane].buttonClass + "-" + action;
                $E
                        .addClass(btn + " " + btn + "-" + pane)
                        .data("layoutName", options.name) // add layout identifier - even if blank!
                        ;
                return $E;
            }
            return null;  // INVALID
        }

        ;


        /**
         * NEW syntax for binding layout-buttons - will eventually replace addToggleBtn, addOpenBtn, etc.
         *
         * @param {(string|!Object)}    selector    jQuery selector (or element) for button, eg: ".ui-layout-north .toggle-button"
         * @param {string}            action
         * @param {string}            pane
         */
        function bindButton(selector, action, pane) {
            switch (action.toLowerCase()) {
                case "toggle":            addToggleBtn(selector, pane);        break;
                case "open":            addOpenBtn(selector, pane);            break;
                case "close":            addCloseBtn(selector, pane);        break;
                case "pin":                addPinBtn(selector, pane);            break;
                case "toggle-slide":    addToggleBtn(selector, pane, true);    break;
                case "open-slide":        addOpenBtn(selector, pane, true);    break;
            }
        }

        ;

        /**
         * Add a custom Toggler button for a pane
         *
         * @param {(string|!Object)}    selector    jQuery selector (or element) for button, eg: ".ui-layout-north .toggle-button"
         * @param {string}              pane         Name of the pane the button is for: 'north', 'south', etc.
         * @param {boolean=}            slide         true = slide-open, false = pin-open
         */
        function addToggleBtn(selector, pane, slide) {
            var $E = getBtn(selector, pane, "toggle");
            if ($E)
                $E.click(function (evt) {
                    toggle(pane, !!slide);
                    evt.stopPropagation();
                });
        }

        ;

        /**
         * Add a custom Open button for a pane
         *
         * @param {(string|!Object)}    selector    jQuery selector (or element) for button, eg: ".ui-layout-north .toggle-button"
         * @param {string}            pane         Name of the pane the button is for: 'north', 'south', etc.
         * @param {boolean=}            slide         true = slide-open, false = pin-open
         */
        function addOpenBtn(selector, pane, slide) {
            var $E = getBtn(selector, pane, "open");
            if ($E)
                $E
                        .attr("title", lang.Open)
                        .click(function (evt) {
                    open(pane, !!slide);
                    evt.stopPropagation();
                })
                        ;
        }

        ;

        /**
         * Add a custom Close button for a pane
         *
         * @param {(string|!Object)}    selector    jQuery selector (or element) for button, eg: ".ui-layout-north .toggle-button"
         * @param {string}           pane         Name of the pane the button is for: 'north', 'south', etc.
         */
        function addCloseBtn(selector, pane) {
            var $E = getBtn(selector, pane, "close");
            if ($E)
                $E
                        .attr("title", lang.Close)
                        .click(function (evt) {
                    close(pane);
                    evt.stopPropagation();
                })
                        ;
        }

        ;

        /**
         * addPinBtn
         *
         * Add a custom Pin button for a pane
         *
         * Four classes are added to the element, based on the paneClass for the associated pane...
         * Assuming the default paneClass and the pin is 'up', these classes are added for a west-pane pin:
         *  - ui-layout-pane-pin
         *  - ui-layout-pane-west-pin
         *  - ui-layout-pane-pin-up
         *  - ui-layout-pane-west-pin-up
         *
         * @param {(string|!Object)}    selector    jQuery selector (or element) for button, eg: ".ui-layout-north .toggle-button"
         * @param {string}           pane         Name of the pane the pin is for: 'north', 'south', etc.
         */
        function addPinBtn(selector, pane) {
            var $E = getBtn(selector, pane, "pin");
            if ($E) {
                var s = state[pane];
                $E.click(function (evt) {
                    setPinState($(this), pane, (s.isSliding || s.isClosed));
                    if (s.isSliding || s.isClosed) open(pane); // change from sliding to open
                    else close(pane); // slide-closed
                    evt.stopPropagation();
                });
                // add up/down pin attributes and classes
                setPinState($E, pane, (!s.isClosed && !s.isSliding));
                // add this pin to the pane data so we can 'sync it' automatically
                // PANE.pins key is an array so we can store multiple pins for each pane
                _c[pane].pins.push(selector); // just save the selector string
            }
        }

        ;

        /**
         * INTERNAL function to sync 'pin buttons' when pane is opened or closed
         * Unpinned means the pane is 'sliding' - ie, over-top of the adjacent panes
         *
         * @see  open(), close()
         * @param {string}    pane   These are the params returned to callbacks by layout()
         * @param {boolean}    doPin  True means set the pin 'down', False means 'up'
         */
        function syncPinBtns(pane, doPin) {
            $.each(_c[pane].pins, function (i, selector) {
                setPinState($(selector), pane, doPin);
            });
        }

        ;

        /**
         * Change the class of the pin button to make it look 'up' or 'down'
         *
         * @see  addPinBtn(), syncPinBtns()
         * @param {Array.<Object>}    $Pin    The pin-span element in a jQuery wrapper
         * @param {string}    pane    These are the params returned to callbacks by layout()
         * @param {boolean}    doPin    true = set the pin 'down', false = set it 'up'
         */
        function setPinState($Pin, pane, doPin) {
            var updown = $Pin.attr("pin");
            if (updown && doPin == (updown == "down")) return; // already in correct state
            var
                    pin = options[pane].buttonClass + "-pin"
                    ,    side = pin + "-" + pane
                    ,    UP = pin + "-up " + side + "-up"
                    ,    DN = pin + "-down " + side + "-down"
                    ;
            $Pin
                    .attr("pin", doPin ? "down" : "up")// logic
                    .attr("title", doPin ? lang.Unpin : lang.Pin)
                    .removeClass(doPin ? UP : DN)
                    .addClass(doPin ? DN : UP)
                    ;
        }

        ;


        /*
         * LAYOUT STATE MANAGEMENT
         *
         * @example .layout({ cookie: { name: "myLayout", keys: "west.isClosed,east.isClosed" } })
         * @example .layout({ cookie__name: "myLayout", cookie__keys: "west.isClosed,east.isClosed" })
         * @example myLayout.getState( "west.isClosed,north.size,south.isHidden" );
         * @example myLayout.saveCookie( "west.isClosed,north.size,south.isHidden", {expires: 7} );
         * @example myLayout.deleteCookie();
         * @example myLayout.loadCookie();
         * @example var hSaved = myLayout.state.cookie;
         */

        function isCookiesEnabled() {
            // TODO: is the cookieEnabled property common enough to be useful???
            return (navigator.cookieEnabled != 0);
        }

        ;

        /**
         * Read & return data from the cookie - as JSON
         *
         * @param {Object=}    opts
         */
        function getCookie(opts) {
            var
                    o = $.extend({}, options.cookie, opts || {})
                    ,    name = o.name || options.name || "Layout"
                    ,    c = document.cookie
                    ,    cs = c ? c.split(';') : []
                    ,    pair    // loop var
                    ;
            for (var i = 0, n = cs.length; i < n; i++) {
                pair = $.trim(cs[i]).split('='); // name=value pair
                if (pair[0] == name) // found the layout cookie
                // convert cookie string back to a hash
                    return decodeJSON(decodeURIComponent(pair[1]));
            }
            return "";
        }

        ;

        /**
         * Get the current layout state and save it to a cookie
         *
         * @param {(string|Array)=}    keys
         * @param {Object=}    opts
         */
        function saveCookie(keys, opts) {
            var
                    o = $.extend({}, options.cookie, opts || {})
                    ,    name = o.name || options.name || "Layout"
                    ,    params = ''
                    ,    date = ''
                    ,    clear = false
                    ;
            if (o.expires.toUTCString)
                date = o.expires;
            else if (typeof o.expires == 'number') {
                date = new Date();
                if (o.expires > 0)
                    date.setDate(date.getDate() + o.expires);
                else {
                    date.setYear(1970);
                    clear = true;
                }
            }
            if (date)        params += ';expires=' + date.toUTCString();
            if (o.path)        params += ';path=' + o.path;
            if (o.domain)    params += ';domain=' + o.domain;
            if (o.secure)    params += ';secure';

            if (clear) {
                state.cookie = {}; // clear data
                document.cookie = name + '=' + params; // expire the cookie
            }
            else {
                state.cookie = getState(keys || o.keys); // read current panes-state
                document.cookie = name + '=' + encodeURIComponent(encodeJSON(state.cookie)) + params; // write cookie
            }

            return $.extend({}, state.cookie); // return COPY of state.cookie
        }

        ;

        /**
         * Remove the state cookie
         */
        function deleteCookie() {
            saveCookie('', { expires: -1 });
        }

        ;

        /**
         * Get data from the cookie and USE IT to loadState
         *
         * @param {Object=}    opts
         */
        function loadCookie(opts) {
            var o = getCookie(opts); // READ the cookie
            if (o) {
                state.cookie = $.extend({}, o); // SET state.cookie
                loadState(o);	// LOAD the retrieved state
            }
            return o;
        }

        ;

        /**
         * Update layout options from the cookie, if one exists
         *
         * @param {Object=}    opts
         * @param {boolean=}    animate
         */
        function loadState(opts, animate) {
            opts = _transformData(opts);
            $.extend(true, options, opts); // update layout options
            // if layout has already been initialized, then UPDATE layout state
            if (state.initialized) {
                var pane, o, s, h, c, a = !animate;
                $.each(_c.allPanes.split(","), function (idx, pane) {
                    o = opts[ pane ];
                    if (typeof o != 'object') return; // no key, continue
                    s = o.size;
                    c = o.initClosed;
                    h = o.initHidden;
                    if (s > 0 || s == "auto") sizePane(pane, s);
                    if (h === true)            hide(pane, a);
                    else if (c === false)    open(pane, false, a);
                    else if (c === true)    close(pane, false, a);
                        else if (h === false)    show(pane, false, a);
                });
            }
        }

        ;

        /**
         * Get the *current layout state* and return it as a hash
         *
         * @param {(string|Array)=}    keys
         */
        function getState(keys) {
            var
                    data = {}
                    ,    alt = { isClosed: 'initClosed', isHidden: 'initHidden' }
                    ,    pair, pane, key, val
                    ;
            if (!keys) keys = options.cookie.keys; // if called by user
            if ($.isArray(keys)) keys = keys.join(",");
            // convert keys to an array and change delimiters from '__' to '.'
            keys = keys.replace(/__/g, ".").split(',');
            // loop keys and create a data hash
            for (var i = 0,n = keys.length; i < n; i++) {
                pair = keys[i].split(".");
                pane = pair[0];
                key = pair[1];
                if (_c.allPanes.indexOf(pane) < 0) continue; // bad pane!
                val = state[ pane ][ key ];
                if (val == undefined) continue;
                if (key == "isClosed" && state[pane]["isSliding"])
                    val = true; // if sliding, then *really* isClosed
                ( data[pane] || (data[pane] = {}) )[ alt[key] ? alt[key] : key ] = val;
            }
            return data;
        }

        ;

        /**
         * Stringify a JSON hash so can save in a cookie or db-field
         */
        function encodeJSON(JSON) {
            return parse(JSON);
            function parse(h) {
                var D = [], i = 0, k, v, t; // k = key, v = value
                for (k in h) {
                    v = h[k];
                    t = typeof v;
                    if (t == 'string')        // STRING - add quotes
                        v = '"' + v + '"';
                    else if (t == 'object')    // SUB-KEY - recurse into it
                        v = parse(v);
                    D[i++] = '"' + k + '":' + v;
                }
                return "{" + D.join(",") + "}";
            }

            ;
        }

        ;

        /**
         * Convert stringified JSON back to a hash object
         */
        function decodeJSON(str) {
            try {
                return window["eval"]("(" + str + ")") || {};
            }
            catch (e) {
                return {};
            }
        }

        ;


        /*
         * #####################
         * CREATE/RETURN LAYOUT
         * #####################
         */

        // validate that container exists
        var $N = $(this).eq(0); // FIRST matching Container element
        if (!$N.length) {
            if (options.showErrorMessages)
                alert(lang.errContainerMissing);
            return null;
        }
        ;

        // Users retreive Instance of a layout with: $N.layout() OR $N.data("layout")
        // return the Instance-pointer if layout has already been initialized
        if ($N.data("layoutContainer") && $N.data("layout"))
            return $N.data("layout"); // cached pointer

        // init global vars
        var
                $Ps = {} // Panes x5	- set in initPanes()
                ,    $Cs = {} // Content x5	- set in initPanes()
                ,    $Rs = {} // Resizers x4	- set in initHandles()
                ,    $Ts = {} // Togglers x4	- set in initHandles()
            //	aliases for code brevity
                ,    sC = state.container // alias for easy access to 'container dimensions'
                ,    sID = state.id // alias for unique layout ID/namespace - eg: "layout435"
                ;

        // create Instance object to expose data & option Properties, and primary action Methods
        var Instance = {
            options:        options            // property - options hash
            ,    state:            state            // property - dimensions hash
            ,    container:        $N                // property - object pointers for layout container
            ,    panes:            $Ps                // property - object pointers for ALL Panes: panes.north, panes.center
            ,    contents:        $Cs                // property - object pointers for ALL Content: content.north, content.center
            ,    resizers:        $Rs                // property - object pointers for ALL Resizers, eg: resizers.north
            ,    togglers:        $Ts                // property - object pointers for ALL Togglers, eg: togglers.north
            ,    toggle:            toggle            // method - pass a 'pane' ("north", "west", etc)
            ,    hide:            hide            // method - ditto
            ,    show:            show            // method - ditto
            ,    open:            open            // method - ditto
            ,    close:            close            // method - ditto
            ,    slideOpen:        slideOpen        // method - ditto
            ,    slideClose:        slideClose        // method - ditto
            ,    slideToggle:    slideToggle        // method - ditto
            ,    initContent:    initContent        // method - ditto
            ,    sizeContent:    sizeContent        // method - ditto
            ,    sizePane:        manualSizePane    // method - pass a 'pane' AND an 'outer-size' in pixels or percent, or 'auto'
            ,    swapPanes:        swapPanes        // method - pass TWO 'panes' - will swap them
            ,    resizeAll:        resizeAll        // method - no parameters
            ,    initPanes:        isInitialized    // method - no parameters
            ,    destroy:        destroy            // method - no parameters
            ,    addPane:        addPane            // method - pass a 'pane'
            ,    removePane:        removePane        // method - pass a 'pane' to remove from layout, add 'true' to delete the pane-elem
            ,    setSizeLimits:    setSizeLimits    // method - pass a 'pane' - update state min/max data
            ,    bindButton:        bindButton        // utility - pass element selector, 'action' and 'pane' (E, "toggle", "west")
            ,    addToggleBtn:    addToggleBtn    // utility - pass element selector and 'pane' (E, "west")
            ,    addOpenBtn:        addOpenBtn        // utility - ditto
            ,    addCloseBtn:    addCloseBtn        // utility - ditto
            ,    addPinBtn:        addPinBtn        // utility - ditto
            ,    allowOverflow:    allowOverflow    // utility - pass calling element (this)
            ,    resetOverflow:    resetOverflow    // utility - ditto
            ,    encodeJSON:        encodeJSON        // method - pass a JSON object
            ,    decodeJSON:        decodeJSON        // method - pass a string of encoded JSON
            ,    getState:        getState        // method - returns hash of current layout-state
            ,    getCookie:        getCookie        // method - update options from cookie - returns hash of cookie data
            ,    saveCookie:        saveCookie        // method - optionally pass keys-list and cookie-options (hash)
            ,    deleteCookie:    deleteCookie    // method
            ,    loadCookie:        loadCookie        // method - update options from cookie - returns hash of cookie data
            ,    loadState:        loadState        // method - pass a hash of state to use to update options
            ,    cssWidth:        cssW            // utility - pass element and target outerWidth
            ,    cssHeight:        cssH            // utility - ditto
            ,    enableClosable: enableClosable
            ,    disableClosable: disableClosable
            ,    enableSlidable: enableSlidable
            ,    disableSlidable: disableSlidable
            ,    enableResizable: enableResizable
            ,    disableResizable: disableResizable
        };

        // create the border layout NOW
        if (_create() === 'cancel') // onload_start callback returned false to CANCEL layout creation
            return null;
        else // true OR false -- if layout-elements did NOT init (hidden or do not exist), can auto-init later
            return Instance; // return the Instance object

    }
})(jQuery);